Update aosp/master LLVM for rebase to r222494.

Change-Id: Ic787f5e0124df789bd26f3f24680f45e678eef2d
diff --git a/docs/GarbageCollection.rst b/docs/GarbageCollection.rst
index dc6dab1..49d3496 100644
--- a/docs/GarbageCollection.rst
+++ b/docs/GarbageCollection.rst
@@ -923,7 +923,7 @@
 
   void MyGCPrinter::finishAssembly(AsmPrinter &AP) {
     MCStreamer &OS = AP.OutStreamer;
-    unsigned IntPtrSize = AP.TM.getDataLayout()->getPointerSize();
+    unsigned IntPtrSize = AP.TM.getSubtargetImpl()->getDataLayout()->getPointerSize();
 
     // Put this in the data section.
     OS.SwitchSection(AP.getObjFileLowering().getDataSection());