Remove binary-only target's depend on source tools
The `binary-only` target currently depends on the `all` target which
always build the source tools, such as afl-cc and afl-as.  This is
unnecessary if the user specifically is asking for only binary fuzzing
tools.
@@ -586,7 +586,7 @@ distrib: all
-cd unicorn_mode && unset CFLAGS && sh ./build_unicorn_support.sh
.PHONY: binary-only
-binary-only: all
+binary-only: $(PROGS)
$(MAKE) -C utils/libdislocator
$(MAKE) -C utils/libtokencap
$(MAKE) -C utils/afl_network_proxy
