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