simplify the arm64 object file generation
simplify the arm64 object file generation

jjaffeux/RubyMotion,HipByte/RubyMotion,beni55/RubyMotion,beni55/RubyMotion,incbee/RubyMotion,hboon/RubyMotion,jjaffeux/RubyMotion,jjaffeux/RubyMotion,katsuyoshi/RubyMotion,incbee/RubyMotion,HipByte/RubyMotion,beni55/RubyMotion,hboon/RubyMotion,incbee/RubyMotion,HipByte/RubyMotion,katsuyoshi/RubyMotion,jjaffeux/RubyMotion,katsuyoshi/RubyMotion,incbee/RubyMotion,hboon/RubyMotion,katsuyoshi/RubyMotion,beni55/RubyMotion