[gimp-macos-build/wip/lukaso/tests] gimp299 requires python3

[Jehan <jehanp src gnome org>]

commit 5fd673abe63d3d64156a1d7f5a7538df3906c4c3
Author: Lukas Oberhuber <lukaso gmail com>
Date:   Sun Sep 12 12:48:44 2021 +0100

    gimp299 requires python3

 jhbuildrc-gtk-osx-gimp | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/jhbuildrc-gtk-osx-gimp b/jhbuildrc-gtk-osx-gimp
index ddfbb60..cafe8fd 100644
--- a/jhbuildrc-gtk-osx-gimp
+++ b/jhbuildrc-gtk-osx-gimp
@@ -171,6 +171,9 @@ module_extra_env['meson'] = { "LC_ALL": "en_US.UTF-8" }
 # absolute here, otherwise anything calling gtkdoc-rebase (i.e. the later gtk+ install) will err with  "bad 
interpreter"
 module_extra_env['gtk-doc'] = { 'PYTHON': '/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6' }
 
+# gimp299 needs PYTHON to be python3
+module_extra_env['gimp299'] = { 'PYTHON': 'python3' }
+
 # DJM - c files built from defs are not including all necessary headers - ignore that
 module_extra_env['pygtk'] = { 'CFLAGS' : '-Wno-error=implicit-function-declaration' }