Android: Fix NDK toolchain dir on arm64 mac

Modules/Platform/Android-Determine.cmake

@@ -267,7 +267,7 @@ endif()
 if(CMAKE_ANDROID_NDK)
   # Identify the host platform.
   if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
-    if(CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "x86_64")
+    if(CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "64")
       set(CMAKE_ANDROID_NDK_TOOLCHAIN_HOST_TAG "darwin-x86_64")
     else()
       set(CMAKE_ANDROID_NDK_TOOLCHAIN_HOST_TAG "darwin-x86")