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/mangle.cpp b/test/CodeGenCXX/mangle.cpp
index c55e3e0..66cc026 100644
--- a/test/CodeGenCXX/mangle.cpp
+++ b/test/CodeGenCXX/mangle.cpp
@@ -280,13 +280,13 @@
   void *v;
 };
 
-// CHECK-LABEL: define %struct.Ops* @_ZN3OpsplERKS_
+// CHECK-LABEL: define nonnull %struct.Ops* @_ZN3OpsplERKS_
 Ops& Ops::operator+(const Ops&) { return *this; }
-// CHECK-LABEL: define %struct.Ops* @_ZN3OpsmiERKS_
+// CHECK-LABEL: define nonnull %struct.Ops* @_ZN3OpsmiERKS_
 Ops& Ops::operator-(const Ops&) { return *this; }
-// CHECK-LABEL: define %struct.Ops* @_ZN3OpsanERKS_
+// CHECK-LABEL: define nonnull %struct.Ops* @_ZN3OpsanERKS_
 Ops& Ops::operator&(const Ops&) { return *this; }
-// CHECK-LABEL: define %struct.Ops* @_ZN3OpsmlERKS_
+// CHECK-LABEL: define nonnull %struct.Ops* @_ZN3OpsmlERKS_
 Ops& Ops::operator*(const Ops&) { return *this; }
 
 // PR5861
@@ -899,7 +899,7 @@
 }
 
 namespace test40 {
-  // CHECK: i32* @_ZZN6test401fEvE1a_0
+  // CHECK: i32* {{.*}} @_ZZN6test401fEvE1a_0
   void h(int&);
   inline void f() {
     if (0) {