Don't compile testcase with clang modules enabled.

It isn't actually necessary for what we are testing here and should
fix the test on the Linux bots.

llvm-svn: 326634

lldb/packages/Python/lldbsuite/test/lang/objc/modules-cache/Makefile

@@ -1,4 +1,3 @@
 LEVEL = ../../../make
 OBJC_SOURCES := main.m
 include $(LEVEL)/Makefile.rules
-CFLAGS += $(MANDATORY_MODULE_BUILD_CFLAGS) -I$(SRCDIR)

lldb/packages/Python/lldbsuite/test/lang/objc/modules-cache/main.m

@@ -1,4 +1,4 @@
-@import Foo;
+#include "f.h"
 int main() {
   f(); // Set breakpoint here.
   return 0;