Addition of debugger comments and whitespace

The removal of legacy code to support long-deprecated debugger support library
resulted in some whitespace changes. Comments from that legacy code were made
public as they may be useful for other debuggers.

Patch by Olga Malysheva.

Differential Revision: http://reviews.llvm.org/D21391


git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@273282 91177308-0d34-0410-b5e6-96231b3b80d8