Skip 32-bit testing of check_public_api_headers (on all platforms, not just Mac OS X)
- since the test program needs to link with LLDB, the test is invalid in 32-bit mode.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@173372 91177308-0d34-0410-b5e6-96231b3b80d8