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/Parser/cxx-template-decl.cpp b/test/Parser/cxx-template-decl.cpp
index 8742900..8b2b120 100644
--- a/test/Parser/cxx-template-decl.cpp
+++ b/test/Parser/cxx-template-decl.cpp
@@ -1,5 +1,6 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s
 // RUN: %clang_cc1 -fsyntax-only -verify %s -fdelayed-template-parsing -DDELAYED_TEMPLATE_PARSING
+// RUN: %clang_cc1 -fsyntax-only -verify -std=gnu++1z %s
 
 
 
@@ -24,6 +25,11 @@
 template <template <typename> > struct Err2;       // expected-error {{template template parameter requires 'class' after the parameter list}}
 template <template <typename> Foo> struct Err3;    // expected-error {{template template parameter requires 'class' after the parameter list}}
 
+template <template <typename> typename Foo> struct Cxx1z;
+#if __cplusplus <= 201402L
+// expected-warning@-2 {{extension}}
+#endif
+
 // Template function declarations
 template <typename T> void foo();
 template <typename T, typename U> void foo();