Adding debug location information to Polly's JSCOP and dot exports

This change adds location information for the detected regions in Polly when the
required debug information is available.

The JSCOP output format is extended with a "location" field which contains the
information in the format "source.c:start-end"

The dot output is extended to contain the location information for each nested
region in the analyzed function.

As part of this change, the existing getDebugLocation function has been moved
into lib/Support/ScopLocation.cpp to avoid having to include
polly/ScopDetectionDiagnostics.h.

Differential Revision: http://reviews.llvm.org/D9431



Contributed-by: Roal Jordans <r.jordans@tue.nl>
llvm-svn: 236393