v3.1.x: usnic makefile fix#6461

jsquyres merged 2 commits intoopen-mpi:v3.1.xopen-mpi/ompi:v3.1.xfrom

jsquyres:pr/v3.1.x/usnic-makefile-fixjsquyres/ompi:pr/v3.1.x/usnic-makefile-fixCopy head branch name to clipboard