Accept "arm" instead of "armv7" in configure, see
   http://valgrind.10908.n7.nabble.com/building-for-arm-td39382.html .

diff -u -r valgrind-3.11.0.orig/configure valgrind-3.11.0/configure
--- valgrind-3.11.0.orig/configure	2015-10-02 20:37:41.915721386 +0200
+++ valgrind-3.11.0/configure	2015-10-02 20:37:54.886746395 +0200
@@ -5607,7 +5607,7 @@
         ARCH_MAX="s390x"
         ;;
 
-     armv7*)
+     arm*)
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ok (${host_cpu})" >&5
 $as_echo "ok (${host_cpu})" >&6; }
 	ARCH_MAX="arm"
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<tr><td><span title='2020-12-08 22:30:07 +0100'>2020-12-08</span></td><td><a href='/guix/commit/nix/libutil?id=2e308238ad09e9527f9b8c3ec4a90b6b05a93367'>daemon: 'Agent' constructor takes a list of environment variables.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-09-14 15:42:55 +0200'>2020-09-14</span></td><td><a href='/guix/commit/nix/libutil?id=ee9dff34f9317509cb2b833d07a0d5e01a36a4ae'>daemon: Move 'Agent' to libutil.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-06-27 23:42:20 +0200'>2020-06-27</span></td><td><a href='/guix/commit/nix/libutil?id=8e6c1415d87272c0221ce328715fc0dd1dd3e032'>daemon: Recognize SHA3 and BLAKE2s.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-06-27 23:42:20 +0200'>2020-06-27</span></td><td><a href='/guix/commit/nix/libutil?id=8dc6c387852bb9505be44567a5f56913633cc23a'>daemon: Remove OpenSSL hash compatibility wrappers.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-06-27 23:42:20 +0200'>2020-06-27</span></td><td><a href='/guix/commit/nix/libutil?id=3fb6b8f30444d41963ba5bdd441123a6d2df17bd'>daemon: Map directly to gcrypt hash functions.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-06-24 19:55:22 +0100'>2020-06-24</span></td><td><a href='/guix/commit/nix/libutil?id=cd43b55da7ab51c996a7a3449c78f2a493616106'>nix: Tweak .gitignore files.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2020-03-26 12:59:33 +0100'>2020-03-26</span></td><td><a href='/guix/commit/nix/libutil?id=d0ed201e0a9736c64cb3c59d8c987c79fd6046d6'>daemon: Avoid kill -1 bug on the Hurd.</a><span class='msg-avail'>...</span></td><td>Manolis Ragkousis</td></tr>
<tr><td><span title='2020-01-12 00:19:09 +0100'>2020-01-12</span></td><td><a href='/guix/commit/nix/libutil?id=7033c7692ccbbbad8f7b9952015de071a5588e87'>daemon: Account for deleted store files when deduplication is on.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-11-29 15:54:20 +0100'>2019-11-29</span></td><td><a href='/guix/commit/nix/libutil?id=b6b014bf42f68fcb71d37204328babb81e0e0855'>daemon: 'pathExists' uses 'statx' when available.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-11-27 00:03:03 +0100'>2019-11-27</span></td><td><a href='/guix/commit/nix/libutil?id=fbecb5cddb2d36cc1a29dac3751b017fa531383c'>daemon: 'deletePath' uses 'statx' when available.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>