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

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<tr><td><span title='2018-01-21 12:53:33 +0200'>2018-01-21</span></td><td><a href='/guix/commit/gnu/packages/orpheus.scm?id=b0b7150b6ce275c3da64588726c936bfab8dc290'>gnu: orpheus: Fix build on aarch64-linux.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2017-01-23 17:23:03 -0500'>2017-01-23</span></td><td><a href='/guix/commit/gnu/packages/orpheus.scm?id=147c6b391b3264fa6606841452e2c8049a01d983'>gnu: orpheus: Don't replace 'sh' reference with 'bash'.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2016-09-23 17:38:25 +0300'>2016-09-23</span></td><td><a href='/guix/commit/gnu/packages/orpheus.scm?id=047cd01d11539b4afc547e430ae7f3b9af976bea'>gnu: orpheus: Use 'modify-phases'.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2016-09-23 17:38:24 +0300'>2016-09-23</span></td><td><a href='/guix/commit/gnu/packages/orpheus.scm?id=5bd6270211b8b4d9335960eb5741c34308187ccd'>gnu: orpheus: Fix build on mips64el.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>