cw: give cw(1onbld) a new interface allowing for multiple arbitrary shadows

@@ -55,12 +55,10 @@
 sysevent/tst.post.exe := LDLIBS += -lsysevent
 sysevent/tst.post_chan.exe := LDLIBS += -lsysevent
 
 ustack/tst.bigstack.exe := COPTFLAG += -xO1
 
-GCC = $(ONBLD_TOOLS)/bin/$(MACH)/cw -_gcc
-
 nfs/%.o: $(SNOOPDIR)/%.c
         $(COMPILE.c) -o $@ $< -I$(SNOOPDIR)
         $(POST_PROCESS_O)
 nfs/tst.call.exe: nfs/tst.call.o nfs/$(SNOOPOBJS)
         $(LINK.c) -o $@ nfs/tst.call.o nfs/$(SNOOPOBJS) $(LDLIBS) -lnsl

@@ -73,14 +71,10 @@
 nfs/tst.call3.exe: nfs/tst.call3.o nfs/$(RPCSVCOBJS)
         $(LINK.c) -o $@ nfs/tst.call3.o nfs/$(RPCSVCOBJS) \
         $(LDLIBS) -lnsl -lrpcsvc
         $(POST_PROCESS) ; $(STRIP_STABS)
 
-pid/tst.gcc.exe: pid/tst.gcc.c
-        $(GCC) -o pid/tst.gcc.exe pid/tst.gcc.c $(LDFLAGS) $(LDLIBS)
-        $(POST_PROCESS) ; $(STRIP_STABS)
-
 json/tst.usdt.o: json/usdt.h
 
 json/usdt.h: json/usdt.d
         $(DTRACE) -h -s json/usdt.d -o json/usdt.h