Marked TestObjCMethods failing tests XFAIL, fixed cleanup code, removed now-passing expected failure markers.

All tests matching '-p TestObjCMethods' now are marked correctly for MacOSX, and some
error classes have been removed in cleanup code looking for files that
might not exist due to previous failure.

See http://llvm.org/bugs/show_bug.cgi?id=20267


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@212650 91177308-0d34-0410-b5e6-96231b3b80d8
Marked failing TestHiddenIvars tests as XFAIL on Darwin.

See http://llvm.org/bugs/show_bug.cgi?id=20269


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@212654 91177308-0d34-0410-b5e6-96231b3b80d8
Marked failing TestObjCDynamicSBType tests XFAIL on Darwin.

See http://llvm.org/bugs/show_bug.cgi?id=20270


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@212655 91177308-0d34-0410-b5e6-96231b3b80d8
Marked failing TestObjCDynamicValue tests as XFAIL on Darwin.

See http://llvm.org/bugs/show_bug.cgi?id=20271


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@212656 91177308-0d34-0410-b5e6-96231b3b80d8
TestRealDefinition tests marked XFAIL on Darwin.

http://llvm.org/bugs/show_bug.cgi?id=20272


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@212657 91177308-0d34-0410-b5e6-96231b3b80d8
Marked TestTargetAPI.test_launch_new_process_and_redirect_stdout_with_* as XFAIL on Darwin.

See http://llvm.org/bugs/show_bug.cgi?id=20273


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@212659 91177308-0d34-0410-b5e6-96231b3b80d8