Fix build failure caused by erroneous use of an undeclared symbol.

Patch copied from upstream bug report:
https://rt.cpan.org/Public/Bug/Display.html?id=117793

From 0be0223422e6e5f4091c6e4e058d213623eed105 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
Date: Mon, 12 Sep 2016 14:40:44 +0200
Subject: [PATCH] Skip preprocessor symbol only CURL_STRICTER
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

CURL_STRICTER leaked into curl-constants.c when building against
curl-7.50.2. This is a preprocessor only macro without a value.

CPAN RT#117793

Signed-off-by: Petr Písař <ppisar@redhat.com>
---
 Makefile.PL | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile.PL b/Makefile.PL
index f9170bb..ad2bd3d 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -127,7 +127,7 @@ if (!defined($curl_h)) {
     close H;
 
     for my $e (sort @syms) {
-       if($e =~ /(OBSOLETE|^CURL_EXTERN|_LAST\z|_LASTENTRY\z)/) {
+       if($e =~ /(OBSOLETE|^CURL_EXTERN|^CURL_STRICTER\z|_LAST\z|_LASTENTRY\z)/) {
           next;
        }
        my ($group) = $e =~ m/^([^_]+_)/;
-- 
2.7.4

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<div class='path'>path: <a href='/guix/log/?id=8a71a01c216c936108dd9f5694ffda991d48c9ea&amp;showmsg=1'>root</a>/<a href='/guix/log/tests?id=8a71a01c216c936108dd9f5694ffda991d48c9ea&amp;showmsg=1'>tests</a>/<a href='/guix/log/tests/sets.scm?id=8a71a01c216c936108dd9f5694ffda991d48c9ea&amp;showmsg=1'>sets.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/tests/sets.scm?id=8a71a01c216c936108dd9f5694ffda991d48c9ea'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2016-04-03 14:19:09 +0200'>2016-04-03</span></td><td class='logsubject'><a href='/guix/commit/tests/sets.scm?id=a9edb211e733b8b34e67ec3b4450567e9376986f'>build: Add a Guile custom test driver using SRFI-64.</a></td><td>Mathieu Lirzin</td></tr>
<tr class='nohover-highlight'><td/><td colspan='3' class='logmsg'>
Before that '.log' files for scheme tests were fragmented and not
included in test-suite.log.  This unifies the semantics of SRFI-64 API
with Automake test suite.

* build-aux/test-driver.scm: New file.
* Makefile.am (SCM_LOG_DRIVER, AM_SCM_LOG_DRIVER_FLAGS): New variables.
(SCM_LOG_COMPILER, AM_SCM_LOG_FLAGS): Delete variables.
(AM_TESTS_ENVIRONMENT): Set GUILE_AUTO_COMPILE to 0.
* test-env.in: Silence guix-daemon.
* doc/guix.texi (Running the Test Suite): Describe how to display the
detailed results.  Bug reports require only 'test-suite.log' file.
* tests/base32.scm, tests/build-utils.scm, tests/builders.scm,
tests/challenge.scm, tests/cpan.scm, tests/cpio.scm, tests/cran.scm,
tests/cve.scm, tests/derivations.scm, tests/elpa.scm,
tests/file-systems.scm, tests/gem.scm, tests/gexp.scm,
tests/gnu-maintenance.scm, tests/grafts.scm, tests/graph.scm,
tests/gremlin.scm, tests/hackage.scm, tests/hash.scm,
tests/import-utils.scm, tests/lint.scm, tests/monads.scm, tests/nar.scm,
tests/packages.scm, tests/pk-crypto.scm, tests/pki.scm,
tests/profiles.scm, tests/publish.scm, tests/pypi.scm,
tests/records.scm, tests/scripts-build.scm, tests/scripts.scm,
tests/services.scm, tests/sets.scm, tests/size.scm, tests/snix.scm,
tests/store.scm, tests/substitute.scm, tests/syscalls.scm,
tests/system.scm, tests/ui.scm, tests/union.scm, tests/upstream.scm,
tests/utils.scm: Don't exit at the end of test groups.
* tests/containers.scm: Likewise.  Use 'test-skip' instead of exiting
with error code 77.


</td></tr>