Update LLVM for 3.5 rebase (r209712).

Change-Id: I149556c940fb7dc92d075273c87ff584f400941f
diff --git a/lib/Bitcode/Reader/BitReader.cpp b/lib/Bitcode/Reader/BitReader.cpp
index 3e360a8..716299f 100644
--- a/lib/Bitcode/Reader/BitReader.cpp
+++ b/lib/Bitcode/Reader/BitReader.cpp
@@ -35,7 +35,7 @@
   if (error_code EC = ModuleOrErr.getError()) {
     if (OutMessage)
       *OutMessage = strdup(EC.message().c_str());
-    *OutModule = wrap((Module*)0);
+    *OutModule = wrap((Module*)nullptr);
     return 1;
   }
 
@@ -55,7 +55,7 @@
       getLazyBitcodeModule(unwrap(MemBuf), *unwrap(ContextRef));
 
   if (error_code EC = ModuleOrErr.getError()) {
-    *OutM = wrap((Module *)NULL);
+    *OutM = wrap((Module *)nullptr);
     if (OutMessage)
       *OutMessage = strdup(EC.message().c_str());
     return 1;