fix a regression in 'rake simulator' introduced by 01315ce30 - also, the 'deployment_target' env variable becomes 'target'
fix a regression in 'rake simulator' introduced by 01315ce30 - also, the 'deployment_target' env variable becomes 'target'

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