compel/Makefile: use force to rebuild test's submake

Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

compel/Makefile

@@ -27,8 +27,10 @@ compel-objs += handle-elf-32.o
 export HOSTCFLAGS_handle-elf-32.o += -DCONFIG_X86_32
 endif # ARCH == x86
 
+.PHONY: .FORCE
+
 export compel-objs
-test/compel/%:
+test/compel/%: .FORCE
 	$(Q) $(MAKE) $(build)=test/compel $@
 
 test: test/compel/test_handle_binary