Update Clang for rebase to r212749.

This also fixes a small issue with arm_neon.h not being generated always.

Includes a cherry-pick of:
r213450 - fixes mac-specific header issue
r213126 - removes a default -Bsymbolic on Android

Change-Id: I2a790a0f5d3b2aab11de596fc3a74e7cbc99081d
diff --git a/test/CodeGenCXX/goto.cpp b/test/CodeGenCXX/goto.cpp
index 904f95f..36bb2a5 100644
--- a/test/CodeGenCXX/goto.cpp
+++ b/test/CodeGenCXX/goto.cpp
@@ -22,7 +22,7 @@
     // CHECK:      store i1 true, i1* [[CLEANUPACTIVE]]
     // CHECK:      [[NEWCAST:%.*]] = bitcast i8* [[NEW]] to [[V]]*
     // CHECK-NEXT: invoke void @_ZN5test01AC1Ev([[A]]* [[TMP]])
-    // CHECK:      invoke void @_ZN5test01VC1ERKNS_1AE([[V]]* [[NEWCAST]], [[A]]* [[TMP]])
+    // CHECK:      invoke void @_ZN5test01VC1ERKNS_1AE([[V]]* [[NEWCAST]], [[A]]* nonnull [[TMP]])
     // CHECK:      store i1 false, i1* [[CLEANUPACTIVE]]
     // CHECK-NEXT: invoke void @_ZN5test01AD1Ev([[A]]* [[TMP]])
     A y;