skip SkipImages unit test on MacOs

In fact concerns MacOs TB 10.10_61
If someone wants to revert it go ahead but in this case, please:
either fix the problem
or disable this TB for the moment
Thank you

Change-Id: Ie8da48a9b117d7d24cbf27b5b5e8773f79464a31

sw/qa/extras/globalfilter/globalfilter.cxx

@@ -43,7 +43,7 @@ public:
     CPPUNIT_TEST(testCharHighlight);
     CPPUNIT_TEST(testMSCharBackgroundEditing);
     CPPUNIT_TEST(testCharBackgroundToHighlighting);
-#if !defined(WNT)
+#if !defined(WNT) && !defined(MACOSX)
     CPPUNIT_TEST(testSkipImages);
 #endif
     CPPUNIT_TEST_SUITE_END();