fix a bug in build system which updated resource files are not copied
fix a bug in build system which updated resource files are not copied

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