make: ship the Joyent patch to enable parallel make (originally from rm)

@@ -10,10 +10,10 @@
 #
 
 # Copyright 2015, Richard Lowe.
 
 MAKE_INCLUDE= $(SRC)/cmd/make/include
-MAKE_DEFS= -DSYSV -DINTER
+MAKE_DEFS= -DSYSV -DINTER -DTEAMWARE_MAKE_CMN
 $(RELEASE_BUILD)MAKE_DEFS += -DNDEBUG
 CFLAGS += $(CCVERBOSE)
 CPPFLAGS += -I$(MAKE_INCLUDE) $(MAKE_DEFS)