Libs after modification and recompilation is not pushed to device on run action for android devices

[DVEfremov]

Steps to reproduce

• Compile caffe-time opencl for example
  $ck compile program:caffe-time-opencl --target_os=android21-arm-v7a

• run it on device

• ck run program:caffe-time-opencl --target_os=android21-arm-v7a --env.CAFFE_COMPUTE_DEVICE_ID=0

• check libs sizes
  adb ls -l /data/local/tmp/tmp/*.so

• -rw-r--r-- shell shell 18051260 2017-01-23 17:44 libOpenCL.so
  -rw-rw-rw- shell shell 22383040 2017-01-24 13:57 libcaffe.so
  -rwxrwxrwx shell shell 17804 2017-01-20 10:55 librtlxopenme.so
  -rwxrwxrwx shell shell 1143844 2017-01-23 17:19 libviennacl.so

• delete caffe package ad some dummy changes to caffe lib and recompile program again

• run again with same program

• check size and time again - the same

[DVEfremov]

Iit's not critical and could be fixed later.

[gfursin]

I currently check size of the program before copying to device (to avoid copying huge files like AlexNet to the device over and over again), however we should probably add check for the date/time of the latest update.