switch to official opencl branch

[DVEfremov]

All my commits related to android support merged to https://github.com/BVLC/caffe/tree/opencl

so I've tested invariants linux/android CPU/GPU all works fine. Details:

• Android - GPU clblast opencl

ck run program:caffe-time-opencl --target_os=android21-arm-v7a

• ok

• Linux - GPU clblast opencl - works fline:

  
  8) ->lib-caffe-bvlc-opencl-clblast-trunk-gcc-5.4.0-linux-64
  ck run program:caffe-time-opencl

• ok ck run program:caffe-classificaiton-opencl -ok

• Linux - GPU opencl branch in CPU mode

  
  -> lib-caffe-bvlc-opencl-cpu-universal2
  ck run program:caffe-time-opencl-cpu

• ok

• Android opencl branch in CPU mode:

  
  -> 0) lib-caffe-bvlc-opencl-cpu-universal2

ck compile program:caffe-time-opencl-cpu --target_os=android21-arm-v7a ck run program:caffe-time-opencl-cpu --target_os=android21-arm-v7a

• ok```

[DVEfremov]

done