[gtk-osx] Make use_local_modulesets available to setup_sdk.

[John Ralls <jralls src gnome org>]

commit 567ea46703b73222a78ab77052c232fcddefcac9
Author: John Ralls <jralls ceridwen us>
Date:   Thu Aug 13 10:56:17 2020 -0700

    Make use_local_modulesets available to setup_sdk.
    
    Required to pass it to _cmd_bootstrap_gtk_osx.run.

 jhbuildrc-gtk-osx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/jhbuildrc-gtk-osx b/jhbuildrc-gtk-osx
index 5e0fb98..83095fd 100644
--- a/jhbuildrc-gtk-osx
+++ b/jhbuildrc-gtk-osx
@@ -240,12 +240,12 @@ osx_ver()
 
 def setup_sdk(target=_target, sdk_version=None, architectures=[_default_arch]):
 
+    global use_local_modulesets
     os.environ["MACOSX_DEPLOYMENT_TARGET"] = target
     sdkdir = None
     xcodepath = None
     xcodeversion = None
 
-
     sdkdir = _popen("xcrun --show-sdk-path")
 
     if sdkdir: