message: Remove multiple include for gpu_tracer.cc
diff: @@ -512,7 +512,6 @@ $(wildcard tensorflow/core/grappler/clusters/single_machine.*)
  # Filter out all the excluded files.
  TF_CC_SRCS := $(filter-out $(CORE_CC_EXCLUDE_SRCS), $(CORE_CC_ALL_SRCS))
  # Add in any extra files that don't fit the patterns easily
  -TF_CC_SRCS += tensorflow/core/platform/default/gpu_tracer.cc
  TF_CC_SRCS += tensorflow/contrib/makefile/downloads/fft2d/fftsg.c
  # Also include the op and kernel definitions.
  TF_CC_SRCS += $(shell cat $(MAKEFILE_DIR)/tf_op_files.txt)
  