Add SBFrame.WatchLocation() to find and watch the location pointed to by
a variable usng the frame as the scope.

Add TestSetWatchpoint.py to exercise this API.  Also fix some SWIG Python
docstrings.


git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@140914 91177308-0d34-0410-b5e6-96231b3b80d8
9 files changed