giflib: build regression with NUMJOBS=-j1

On new giflib version 5.2.2, patch giflib.GifQuantizeBuffer.diff.gz misses ($UOBJECT) dependency (it will fail to build on single-job make).

Fixed patch:
Code:--- ./Makefile.orig 2024-02-19 13:22:38.525026520 -0600
+++ ./Makefile 2024-03-04 15:01:37.446904111 +0100
@@ -95,11 +95,11 @@

$(UTILS):: libgif.a libutil.a

-$(LIBGIFSO): $(OBJECTS) $(HEADERS)
+$(LIBGIFSO): $(OBJECTS) $(UOBJECTS) $(HEADERS)
ifeq ($(UNAME), Darwin)
$(CC) $(CFLAGS) -dynamiclib -current_version $(LIBVER) $(OBJECTS) -o $(LIBGIFSO)
else
- $(CC) $(CFLAGS) -shared $(LDFLAGS) -Wl,-soname -Wl,$(LIBGIFSOMAJOR) -o $(LIBGIFSO) $(OBJECTS)
+ $(CC) $(CFLAGS) -shared $(LDFLAGS) -Wl,-soname -Wl,$(LIBGIFSOMAJOR) -o $(LIBGIFSO) $(OBJECTS) $(UOBJECTS)
endif

libgif.a: $(OBJECTS) $(HEADERS)