* Have a TFLM-specific version of lite/kernels/op_macros.h

 * After this change, we can remove the TFLM-specific code from upstream
   Tensorflow.
 * Both the TfLite and TFLM implementations of op_macros.h will be
   simplified.

BUG=http://b/187728891
NO_CHECK_TFLITE_FILE=lite/kernels/kernel_util.cc will be modified in upstream as well

* Fix target-specific makefile build.