Minor LLDB test improvements
- fix TestCPPBool (was failing with some versions of GCC due to num_breakpoint_locations)
- speed up tests by skipping git/svn revision parsing by the test harness when running in lit-compatible (parsable) mode

This should resolve the failures reported by http://lab.llvm.org:8011/builders/lldb-x86_64-linux



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@176972 91177308-0d34-0410-b5e6-96231b3b80d8