xfail tests that failed with clang-3.7, gcc4.8.2 and on i386 to get buildbot green

Summary:
-Refer to bug https://buganizer.corp.google.com/issues/19893563
-Test log http://lab.llvm.org:8011/builders/lldb-x86_64-ubuntu-14.04-cmake/builds/1145

Test Plan: Run tests with different compiler and archs locally

Reviewers: sivachandra, ovyalov, chaoren, vharron

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8573

llvm-svn: 233157

lldb/test/python_api/watchpoint/watchlocation/TestTargetWatchAddress.py

@@ -48,6 +48,7 @@ class TargetWatchAddressAPITestCase(TestBase):
 
     @python_api_test
     @dwarf_test
+    @expectedFailureGcc #xfail to get buildbot green, test failed with gcc4.8.2
     def test_watch_address_with_invalid_watch_size_with_dwarf(self):
         """Exercise SBTarget.WatchAddress() API but pass an invalid watch_size."""
         self.buildDwarf()