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
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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

ine.scm'>log</a><a href='/guix/tree/gnu/machine.scm?id=fd53b2122ce0d28de94383d21879d4ee9fcee163'>tree</a><a href='/guix/commit/gnu/machine.scm?id=fd53b2122ce0d28de94383d21879d4ee9fcee163'>commit</a><a href='/guix/diff/gnu/machine.scm?id=fd53b2122ce0d28de94383d21879d4ee9fcee163'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/machine.scm'>
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<div class='path'>path: <a href='/guix/log/?id=fd53b2122ce0d28de94383d21879d4ee9fcee163'>root</a>/<a href='/guix/log/gnu?id=fd53b2122ce0d28de94383d21879d4ee9fcee163'>gnu</a>/<a href='/guix/log/gnu/machine.scm?id=fd53b2122ce0d28de94383d21879d4ee9fcee163'>machine.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/machine.scm?id=fd53b2122ce0d28de94383d21879d4ee9fcee163&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-07-25 19:11:36 +0200'>2020-07-25</span></td><td><a href='/guix/commit/gnu/machine.scm?id=a5e2fc73760a2ae023f2e56bdbf8025971f90e64'>utils: Move &lt;location&gt; and '&amp;error-location' to (guix diagnostics).</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/utils.scm (&lt;location&gt;, source-properties-&gt;location)
(location-&gt;source-properties, &amp;error-location): Move to...
* guix/diagnostics.scm: ... here.
* gnu.scm: Adjust imports accordingly.
* gnu/machine.scm: Likewise.
* gnu/system.scm: Likewise.
* gnu/tests.scm: Likewise.
* guix/inferior.scm: Likewise.
* tests/channels.scm: Likewise.
* tests/packages.scm: Likewise.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-02-09 23:16:45 +0100'>2020-02-09</span></td><td><a href='/guix/commit/gnu/machine.scm?id=e81344428726f3dae5d2a2e7bb296f46fcde6cc5'>Update e-mail address for Jakob L. Kreuze.</a><span class='msg-avail'>...<span class='msg-tooltip'>As requested here:
&lt;https://lists.gnu.org/archive/html/guix-devel/2020-02/msg00128.html&gt;.

* .mailmap: Add an entry for Jakob.
* gnu/machine.scm, gnu/machine/digital-ocean.scm, gnu/machine/ssh.scm,
gnu/packages/admin.scm, gnu/packages/i2p.scm, gnu/packages/music.scm,
gnu/packages/web.scm, gnu/tests/reconfigure.scm, guix/scripts/deploy.scm,
guix/scripts/system/reconfigure.scm: Update their e-mail address.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-12-08 00:47:26 +0100'>2019-12-08</span></td><td><a href='/guix/commit/gnu/machine.scm?id=a1d7920861a8d6c6774149eaf939eb2636942090'>machine: Remove unnecessary record self-referencing bindings.</a><span class='msg-avail'>...<span class='msg-tooltip'>'this-machine' and 'this-machine-ssh-configuration' were useless given
that there are no thunked fields.

* gnu/machine.scm (&lt;machine&gt;)[this-machine]: Remove.
* gnu/machine/ssh.scm (&lt;machine-ssh-configuration&gt;)
[this-machine-ssh-configuration]: Remove.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-12-07 00:59:56 +0100'>2019-12-07</span></td><td><a href='/guix/commit/gnu/machine.scm?id=eaabc5e87f4e48d7bce88ca231f5fc2d554ca3d6'>machine: Add provenance tracking to each machine operating system.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/machine.scm (&lt;machine&gt;): Rename accessor to
'%machine-operating-system'.
(machine-operating-system): New procedure.
* doc/guix.texi (Service Reference): Mention it.
</span></span></td><td>Ludovic Courtès</td></tr>