Add sub-testcase where we process Cocoa.h using --disable-free (i.e., test the usage of the BumpPtrAllocator in ASTContext).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63957 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaObjC/cocoa.m b/test/SemaObjC/cocoa.m
index 795e0c8..543c285 100644
--- a/test/SemaObjC/cocoa.m
+++ b/test/SemaObjC/cocoa.m
@@ -1,4 +1,5 @@
 // RUN: clang %s -print-stats &&
+// RUN: clang %s -disable-free &&
 // RUN: clang -x objective-c-header -o %t %s && clang -token-cache %t %s &&
 // RUN: clang -x objective-c-header -o %t %s && clang -token-cache %t %s -E %s -o /dev/null
 #ifdef __APPLE__