[ASTMatchers] Fix standalone build

Disable the tests and remove private include introduced in d89f9e963e.

clang/unittests/ASTMatchers/ASTMatchersInternalTest.cpp

@@ -12,7 +12,6 @@
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "clang/Tooling/Tooling.h"
 #include "llvm/ADT/Triple.h"
-#include "llvm/Config/config.h"
 #include "llvm/Support/Host.h"
 #include "llvm/Testing/Support/SupportHelpers.h"
 #include "gtest/gtest.h"
@@ -36,6 +35,8 @@ TEST(HasNameDeathTest, DiesOnEmptyPattern) {
     }, "");
 }
 
+// FIXME Re-enable these tests without breaking standalone builds.
+#if 0
 // FIXME: Figure out why back traces aren't being generated on clang builds on
 // windows.
 #if ENABLE_BACKTRACES && (!defined(_MSC_VER) || !defined(__clang__))
@@ -138,6 +139,7 @@ TEST(MatcherCrashDeathTest, CrashOnCallbackDump) {
 }
 #endif // ENABLE_BACKTRACES
 #endif
+#endif
 
 TEST(ConstructVariadic, MismatchedTypes_Regression) {
   EXPECT_TRUE(