suppress the message of stdout
suppress the message of stdout

`deploy` command will display CPU arch in stdout with Kernel#system.

Related to def6dd0b058c19ac13407d123f21cc808562ed3a and 42d191cf338c09f5e9b252c9a8c9c36a44fa5bf3

katsuyoshi/RubyMotion,HipByte/RubyMotion,katsuyoshi/RubyMotion,katsuyoshi/RubyMotion,katsuyoshi/RubyMotion,HipByte/RubyMotion,hboon/RubyMotion,hboon/RubyMotion,HipByte/RubyMotion,hboon/RubyMotion