Add gdb-remote test for $qMemoryRegionInfo code querying.

Added test stub for collecting a code, heap and stack address.

Added test to verify that the code address returns a readable,
executable memory region and that the memory region range
was indeed the one that the code belonged to.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@210187 91177308-0d34-0410-b5e6-96231b3b80d8