[gtk+] build: Bump minimum GLib version to 2.53.7

[Matthias Clasen <matthiasc src gnome org>]

commit 5a32b78ba16685d978cc94bd6b892ba8181e7b1c
Author: Felipe Borges <felipeborges gnome org>
Date:   Wed Sep 27 11:53:50 2017 +0200

    build: Bump minimum GLib version to 2.53.7
    
    Otherwise it fails to build with:
    
    GLib-Genmarshal-WARNING **: failed to open "--pragma-once":
    No such file or directory
    
    https://bugzilla.gnome.org/show_bug.cgi?id=788230

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 8135e52..0e0b669 100644
--- a/meson.build
+++ b/meson.build
@@ -12,7 +12,7 @@ project('gtk+-4.0', 'c',
 
 glib_major_req = 2
 glib_minor_req = 53
-glib_micro_req = 1
+glib_micro_req = 7
 
 if glib_minor_req.is_odd()
   glib_min_required = 'GLIB_VERSION_@0@_@1@'.format(glib_major_req, glib_minor_req - 1)