Teach the CF retain checker about "_init" methods.  Fixes: <rdar://problem/5956379>


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@51872 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/CFRefCount.cpp b/lib/Analysis/CFRefCount.cpp
index 5660929..24971ed 100644
--- a/lib/Analysis/CFRefCount.cpp
+++ b/lib/Analysis/CFRefCount.cpp
@@ -607,7 +607,7 @@
   const char* s = S.getIdentifierInfoForSlot(0)->getName();
   assert (ScratchArgs.empty());
   
-  if (strncmp(s, "init", 4) == 0)
+  if (strncmp(s, "init", 4) == 0 || strncmp(s, "_init", 5) == 0)
     return getInitMethodSummary(S);  
   
   // "copyXXX", "createXXX", "newXXX": allocators.