libselinux utils: override LD{FLAGS, LIBS} for libselinux.so in Makefile

the utils dir link to libselinux.so which was just built, if LDFLAGS or
LDLIBS were specificed on the make commandline then the search path is
not appended. Add the override directive to fix this.

Gentoo-Bug: https://bugs.gentoo.org/621762

Signed-off-by: Jason Zaman <jason@perfinion.com>

libselinux/utils/Makefile

@@ -46,8 +46,8 @@ override LDFLAGS += -L../../libsepol/src -undefined dynamic_lookup
 endif
 
 override CFLAGS += -I../include -D_GNU_SOURCE $(DISABLE_FLAGS) $(PCRE_CFLAGS)
-LDFLAGS += -L../src
-LDLIBS += -lselinux
+override LDFLAGS += -L../src
+override LDLIBS += -lselinux
 PCRE_LDLIBS ?= -lpcre
 
 ifeq ($(ANDROID_HOST),y)