make: add deps for libsoccr

Without this patch when we change libsoccr, criu isn't rebuilt.

travis-ci: success for series starting with [01/21] build: install libnet-dev
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/Makefile

@@ -77,6 +77,7 @@ PROGRAM-BUILTINS	+= criu/pie/lib.a
 PROGRAM-BUILTINS	+= images/built-in.o
 PROGRAM-BUILTINS	+= $(obj)/built-in.o
 PROGRAM-BUILTINS	+= $(ARCH-LIB)
+PROGRAM-BUILTINS	+= soccr/libsoccr.a
 
 $(obj)/built-in.o: pie
 	$(Q) $(MAKE) $(call build-as,Makefile.crtools,criu) all