Force HWLOC topology method for NUMA-specific topology

If user requested affinity with granularity=tile we need to either use HWLOC
or ignore the request. The change allows user to not specify
KMP_TOPOLOGY_METHOD=hwloc and choose it automatically instead.

Patch by Andrey Churbanov

Differential Revision: https://reviews.llvm.org/D40905

llvm-svn: 322205