MFC: r1.125: Fix -j with Makefiles specified via stdin.
MFC: r1.125: Fix -j with Makefiles specified via stdin.

Requested by:	Ulrich Spoerlein <uspoerlein@gmail.com>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase