https://bugs.gentoo.org/935393
https://github.com/vandry/Perl-Locale-gettext/issues/7
https://github.com/vandry/Perl-Locale-gettext/pull/4

From e6e30992fa4ca3e7ecf417a23a9c46af8f671226 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Salvador=20Fandi=C3=B1o?= <sfandino@yahoo.com>
Date: Fri, 27 Oct 2017 16:22:54 +0200
Subject: [PATCH] skip for C.UTF-8 too

--- a/t/lib/gen_test_data.pl
+++ b/t/lib/gen_test_data.pl
@@ -28,11 +28,11 @@ sub gen {
 		skip("cannot run test without a locale set", 0);
 		exit 0;
 	}
-	if ($messages eq 'C') {
+	if ($messages =~ /^C(\..*)?$/) {
 		skip("cannot run test in the C locale", 0);
 		exit 0;
 	}
-	if ($messages eq 'POSIX') {
+	if ($messages =~ /^POSIX(\..*)?$/) {
 		skip("cannot run test in the POSIX locale", 0);
 		exit 0;
 	}