[gtk-osx] Add XCode5 CC definitions

[John Ralls <jralls src gnome org>]

commit e1b3c97b8449e00ffd7a64000cb5d0ac62da375d
Author: John Ralls <jralls ceridwen us>
Date:   Thu Sep 19 13:18:09 2013 -0700

    Add XCode5 CC definitions

 jhbuildrc-gtk-osx |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/jhbuildrc-gtk-osx b/jhbuildrc-gtk-osx
index bc57920..70d2567 100644
--- a/jhbuildrc-gtk-osx
+++ b/jhbuildrc-gtk-osx
@@ -282,6 +282,10 @@ def setup_sdk(target, sdk_version, architectures=[_default_arch]):
         os.environ["CC"] = os.path.join(_toolpath, "gcc-4.0")
         os.environ["OBJC"] = os.path.join(_toolpath, "gcc-4.0")
         os.environ["CXX"] = os.path.join(_toolpath, "g++-4.0")
+    elif xcodeversion >= 5.0:
+        os.environ["CC"] = "gcc"
+        os.environ["OBJC"] = "gcc"
+        os.environ["CXX"] = "g++"
     elif _osx_version >= 7.0 and xcodeversion > 4.0:
         os.environ["CC"] = os.path.join(_toolpath, "llvm-gcc-4.2")
         os.environ["OBJC"] = os.path.join(_toolpath, "llvm-gcc-4.2")