[gimp-macos-build] Use our modulset

[Alex Samorukov <asamorukov src gnome org>]

commit 343e19cb4cd7438717be997d9dc2a378a3923599
Author: Oleksii Samorukov <oleksii_samorukov mckinsey com>
Date:   Thu Aug 29 00:01:53 2019 +0200

    Use our modulset

 jhbuildrc-gtk-osx-gimp | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/jhbuildrc-gtk-osx-gimp b/jhbuildrc-gtk-osx-gimp
index a7efe48..a6334e1 100644
--- a/jhbuildrc-gtk-osx-gimp
+++ b/jhbuildrc-gtk-osx-gimp
@@ -154,6 +154,9 @@ environ_prepend('OBJCFLAGS', "-O3")
 #
 # os.environ["CC"] = "/usr/bin/gcc-4.0"
 
+# use our modulset
+moduleset = 'https://gitlab.gnome.org/samm-git/gtk-osx/raw/fork-test/modulesets/gtk-osx.modules'
+
 # Fix Python detection
 module_extra_env['itstool'] = { "PYTHON": os.path.expanduser("~/gtk/inst/bin/python") }