build ARM binary to run spec on device with "rake spec:device"

[Watson1978]

To run bluepotion specs with "rake spec:device", it need to build ARM binary instead of "x86"

[Watson1978]

@GantMan

If ARGV has a String object (like following), it will worked as you say.

irb(main):001:0> "spec:device".include?("device")
=> true

However, ARGV has always an Array object like following.

irb(main):002:0> ["spec:device"].include?("device")
=> false

So, when try to run spec on real device, I think we need my patch.

[GantMan]

Great catch!