build: compel -- Drop double targeting

It's a hostprog so one target is enough,
otherwise we're gitting double deps generation.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

Makefile

@@ -202,7 +202,8 @@ $(eval $(call gen-built-in,images))
 .PHONY: .FORCE
 
 # Compel get used by CRIU, build it earlier
-$(eval $(call gen-built-in,compel))
+compel/%:
+	$(Q) $(MAKE) $(build)=compel $@
 
 #
 # Next the socket CR library