Updated gypi for tests to work on osx.

Review URL: http://webrtc-codereview.appspot.com/250002

git-svn-id: http://webrtc.googlecode.com/svn/trunk@830 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/audio_coding/main/source/audio_coding_module.gypi

@@ -122,11 +122,16 @@
              '../test/utility.cpp',
           ],
           'conditions': [
-            ['OS=="linux"', {
+            ['OS=="linux" or OS=="mac"', {
               'cflags': [
                 '-fexceptions', # enable exceptions
               ],
             }],
+            ['OS=="mac"', {
+              'xcode_settings': {
+                'GCC_ENABLE_CPP_EXCEPTIONS': 'YES', # -fexceptions
+              }
+            }],
           ],
         },
       ],