A little cleanup.  {Disable/Enable}Breakpoint actually disables/enables BreakpointSites not breakpoints, it is confusing
to have it not named appropriately.  Also in StopInfoMachException, we aren't testing for software or not software, just
whether the thing is a breakpoint we set.  So don't use "software"...


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@175241 91177308-0d34-0410-b5e6-96231b3b80d8
Only enable RTTI for cxa_demangle.cpp

If testing on Linux+clang proves it needs RTTI, wa can remove the
conditionals.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@175242 91177308-0d34-0410-b5e6-96231b3b80d8