Teach ccc-analyzer about -fobjc-arc.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144778 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/scan-build/ccc-analyzer b/tools/scan-build/ccc-analyzer
index fa2bff0..142598f 100755
--- a/tools/scan-build/ccc-analyzer
+++ b/tools/scan-build/ccc-analyzer
@@ -321,6 +321,7 @@
   '-nostdinc' => 0,
   '-fblocks' => 0,
   '-fno-builtin' => 0,
+  '-fobjc-arc' => 0,
   '-fobjc-gc-only' => 0,
   '-fobjc-gc' => 0,
   '-ffreestanding' => 0,