glib2: update to 2.56.0

Signed-off-by: Peter Wagner <tripolar@gmx.at>

libs/glib2/patches/001-automake-compat.patch

@@ -1,6 +1,6 @@
 --- a/gtk-doc.make
 +++ b/gtk-doc.make
-@@ -277,7 +277,7 @@ uninstall-local:
+@@ -298,7 +298,7 @@ uninstall-local:
  #
  # Require gtk-doc when making dist
  #

libs/glib2/patches/002-gdate-Suppress-string-format-literal-warning.patch

@@ -1,24 +0,0 @@
-From 0817af40e8c74c721c30f6ef482b1f53d12044c7 Mon Sep 17 00:00:00 2001
-From: coypu <coypu@sdf.org>
-Date: Mon, 8 Feb 2016 00:06:06 +0200
-Subject: gdate: Suppress string format literal warning
-
-Newer versions of GCC emit an error here, but we know it's safe.
-https://bugzilla.gnome.org/761550
----
- glib/gdate.c | 3 +++
- 1 file changed, 3 insertions(+)
-
---- a/glib/gdate.c
-+++ b/glib/gdate.c
-@@ -2497,7 +2497,10 @@ g_date_strftime (gchar       *s,
-        * recognize whether strftime actually failed or just returned "".
-        */
-       tmpbuf[0] = '\1';
-+      #pragma GCC diagnostic push
-+      #pragma GCC diagnostic ignored "-Wformat-nonliteral"
-       tmplen = strftime (tmpbuf, tmpbufsize, locale_format, &tm);
-+      #pragma GCC diagnostic pop
- 
-       if (tmplen == 0 && tmpbuf[0] != '\0')
-         {