meson: Bump GLIB_VERSION_MAX_ALLOWED to 2.76

libglnx update in d7fcee0 uses g_clear_fd() (GLib >= 2.76), but
GLIB_VERSION_MAX_ALLOWED was still 2.70, triggering
deprecation warnings when compiling with newer Glib.

g_clear_fd() has a compat implementation inside libglnx so there's no
need to bump the minimum GLib requirement.

Author: bbhtt

configure.ac

@@ -13,7 +13,7 @@ AC_INIT([flatpak-builder],
         [http://flatpak.org/])
 
 AC_DEFINE([GLIB_VERSION_MIN_REQUIRED], [GLIB_VERSION_2_66], [Glib min version])
-AC_DEFINE([GLIB_VERSION_MAX_ALLOWED], [GLIB_VERSION_2_70], [Glib max version])
+AC_DEFINE([GLIB_VERSION_MAX_ALLOWED], [GLIB_VERSION_2_76], [Glib max version])
 
 GLIB_REQS=2.66
 OSTREE_REQS=2017.14

src/meson.build

@@ -33,7 +33,7 @@ config_data.set_quoted('DEBUGEDIT', debugedit.full_path())
 config_data.set_quoted('GETTEXT_PACKAGE', meson.project_name())
 config_data.set_quoted('PACKAGE_VERSION', meson.project_version())
 config_data.set_quoted('PACKAGE_STRING', '@0@-@1@'.format(meson.project_name(), meson.project_version()))
-config_data.set('GLIB_VERSION_MAX_ALLOWED', 'GLIB_VERSION_2_70')
+config_data.set('GLIB_VERSION_MAX_ALLOWED', 'GLIB_VERSION_2_76')
 config_data.set('GLIB_VERSION_MIN_REQUIRED', 'GLIB_VERSION_2_66')
 
 # We support targeting specific fuse versions to optimize performance.