Fix build with gfortran 10.

Taken from Debian:
https://salsa.debian.org/science-team/atlas/-/blob/master/debian/patches/gfortran-10.patch

--- a/interfaces/blas/C/testing/c_dblat1.f
+++ b/interfaces/blas/C/testing/c_dblat1.f
@@ -247,11 +247,11 @@
             IF (ICASE.EQ.7) THEN
 *              .. DNRM2TEST ..
                STEMP(1) = DTRUE1(NP1)
-               CALL STEST1(DNRM2TEST(N,SX,INCX),STEMP,STEMP,SFAC)
+               CALL STEST1(DNRM2TEST(N,SX,INCX),STEMP(1),STEMP,SFAC)
             ELSE IF (ICASE.EQ.8) THEN
 *              .. DASUMTEST ..
                STEMP(1) = DTRUE3(NP1)
-               CALL STEST1(DASUMTEST(N,SX,INCX),STEMP,STEMP,SFAC)
+               CALL STEST1(DASUMTEST(N,SX,INCX),STEMP(1),STEMP,SFAC)
             ELSE IF (ICASE.EQ.9) THEN
 *              .. DSCALTEST ..
                CALL DSCALTEST(N,SA((INCX-1)*5+NP1),SX,INCX)
--- a/interfaces/blas/C/testing/c_sblat1.f
+++ b/interfaces/blas/C/testing/c_sblat1.f
@@ -247,11 +247,11 @@
             IF (ICASE.EQ.7) THEN
 *              .. SNRM2TEST ..
                STEMP(1) = DTRUE1(NP1)
-               CALL STEST1(SNRM2TEST(N,SX,INCX),STEMP,STEMP,SFAC)
+               CALL STEST1(SNRM2TEST(N,SX,INCX),STEMP(1),STEMP,SFAC)
             ELSE IF (ICASE.EQ.8) THEN
 *              .. SASUMTEST ..
                STEMP(1) = DTRUE3(NP1)
-               CALL STEST1(SASUMTEST(N,SX,INCX),STEMP,STEMP,SFAC)
+               CALL STEST1(SASUMTEST(N,SX,INCX),STEMP(1),STEMP,SFAC)
             ELSE IF (ICASE.EQ.9) THEN
 *              .. SSCALTEST ..
                CALL SSCALTEST(N,SA((INCX-1)*5+NP1),SX,INCX)
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<div class='path'>path: <a href='/guix/log/?id=e740cc614096e768813280c718f9e96343ba41b3'>root</a>/<a href='/guix/log/gnu?id=e740cc614096e768813280c718f9e96343ba41b3'>gnu</a>/<a href='/guix/log/gnu/tests?id=e740cc614096e768813280c718f9e96343ba41b3'>tests</a>/<a href='/guix/log/gnu/tests/version-control.scm?id=e740cc614096e768813280c718f9e96343ba41b3'>version-control.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/tests/version-control.scm?id=e740cc614096e768813280c718f9e96343ba41b3&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-11-07 12:07:41 +0100'>2020-11-07</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=de6b649f8031cc2fa45099a3c41d78c2e302fdf2'>tests: git-http: Avoid race condition.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-10-18 01:12:22 +0200'>2018-10-18</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=39d7fdce453b0ca23ecbed72048647debbaa58a6'>services: dhcp-client: Deprecate 'dhcp-client-service' procedure.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-10-02 08:11:17 +0100'>2018-10-02</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=f8e710684e5c3f866413dff825ba17bdffceac5d'>services: Add Gitolite.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2018-09-29 21:18:45 -0400'>2018-09-29</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=17bea1803cf706d8db053d8d73302a4455684d29'>Revert "services: Add Gitolite."</a><span class='msg-avail'>...</span></td><td>Mark H Weaver</td></tr>
<tr><td><span title='2018-09-28 21:00:18 +0100'>2018-09-28</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=258a6d944ed891fa92fa87a16731e5dfe0bac477'>services: Add Gitolite.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2018-06-13 09:11:45 +0200'>2018-06-13</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=c24b15472baaa7ec67d48cbf296bbe5ab727b78f'>tests: Honor the return value of 'start-service'.</a><span class='msg-avail'>...</span></td><td>Clément Lassieur</td></tr>
<tr><td><span title='2018-02-28 04:40:56 +0300'>2018-02-28</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=e1cf4fd2d2fc0aab0f91c8ac961a8134cbefe200'>services: cgit: Add more configuration fields.</a><span class='msg-avail'>...</span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2018-01-21 00:24:03 +0100'>2018-01-21</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=d466b1fc8221a6224fe7ded53a828f9c29ed9457'>services: Missing services are automatically instantiated.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-21 00:24:03 +0100'>2018-01-21</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=bc58201ec22aeb07b61dc1e482d6a57868436eef'>tests: Cgit test waits for /var/run/shepherd/socket.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-12-18 12:03:14 +0100'>2017-12-18</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=8b223ceac4ff0781e95d69362875f87cff03f4d6'>services: nginx: Replace 'http-port' and 'https-port' with 'listen'.</a><span class='msg-avail'>...</span></td><td>Clément Lassieur</td></tr>
<tr><td><span title='2017-11-28 23:34:25 +0100'>2017-11-28</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=87dad874c929702192ece2d38a7a583b8202f348'>tests: Add 'git-http' test.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-11-28 23:34:25 +0100'>2017-11-28</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=e755692bc1795382b2f91fc9763a690c02899954'>tests: cgit: Add a file to the test repository.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-10-03 17:07:54 +0200'>2017-10-03</span></td><td><a href='/guix/commit/gnu/tests/version-control.scm?id=032a2760eef6dc64fa36f2fb3a211b755d5124bb'>gnu: services: Add cgit.</a><span class='msg-avail'>...</span></td><td>Oleg Pykhalov</td></tr>