Update __init__.py

Author: TheBrokenRail

pythonforandroid/recipes/python3/__init__.py

@@ -70,7 +70,7 @@ def build_arch(self, arch):
             android_host = arch.command_prefix
             android_build = sh.Command(join(recipe_build_dir, 'config.guess'))().stdout.strip().decode('utf-8')
             platform_dir = join(self.ctx.ndk_dir, 'platforms', platform_name, arch.platform_dir)
-            toolchain = '{android_host}-4.9'.format(android_host=android_host)
+            toolchain = '{android_host}-4.9'.format(android_host=arch.toolchain_prefix)
             toolchain = join(self.ctx.ndk_dir, 'toolchains', toolchain, 'prebuilt', 'linux-x86_64')
 
             target_data = arch.command_prefix.split('-')