Workaround arm64/clang crashes by avoiding TLS.

We only use it in these two places, it should be okay for now.  Still not
working on r13 on a SHIELD TV.

Common/Misc.cpp

@@ -23,6 +23,10 @@
 #if defined(__APPLE__) || defined(__SYMBIAN32__)
 #define __thread
 #endif
+// Experiencing emutls crashes on ARM64 Android, so disabling for now.
+#if defined(ANDROID) && !defined(ARM64)
+#define __thread
+#endif
 
 #ifdef _WIN32
 #include "CommonWindows.h"

ext/native/thread/threadutil.cpp

@@ -1,7 +1,8 @@
 #ifdef _WIN32
 #include <windows.h>
 #define TLS_SUPPORTED
-#elif defined(ANDROID)
+// Experiencing emutls crashes on ARM64 Android, so disabling for now.
+#elif defined(ANDROID) && !defined(ARM64)
 #define TLS_SUPPORTED
 #endif