Merge pull request #387 from ricardoquesada/android_toolchain_select

fix: add the possibility to change the NDK toolchain

Author: minggo

plugins/plugin_compile/build_android.py

@@ -198,6 +198,9 @@ def update_project(self, android_platform):
                 shutil.copy(src_path, dst_path)
 
     def get_toolchain_version(self, ndk_root, compile_obj):
+        # it should be possible to override the toolchain
+        if 'NDK_TOOLCHAIN_VERSION' in os.environ:
+            return os.environ['NDK_TOOLCHAIN_VERSION']
         return '4.9'