Branch no lld (llvm#139187)

I suspect the test may be failing because lld doesn't behave the same
way the native Darwin linker does. Trying that theory here...

Author: jimingham

lldb/test/API/macosx/branch-islands/Makefile

@@ -4,7 +4,7 @@ CFLAGS_EXTRAS := -std=c99
 include Makefile.rules
 
 a.out: main.o padding1.o padding2.o padding3.o padding4.o foo.o
-	${CC} ${LDFLAGS} foo.o padding1.o padding2.o padding3.o padding4.o main.o -o a.out
+	${CC} ${LDFLAGS} -fuse-ld=/usr/bin/ld foo.o padding1.o padding2.o padding3.o padding4.o main.o -o a.out
 
 %.o: $(SRCDIR)/%.s
 	${CC} -c $<