[spec] refactor to use Platform
[spec] refactor to use Platform

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