Add an -A option to "break set -p" to search all files for matches. Also add the...

Add an -A option to "break set -p" to search all files for matches.  Also add the version of
SBTarget::BreakpointCreateBySourceRegex that takes file spec lists to the Python interface,
and add a test for this.

<rdar://problem/19805037>

llvm-svn: 228938