Created by: dolphin8

add profile to debug log 'op_type cpu_tick percentage'

DEBUG   [file: io.cpp] [line: 358] : ========================[ profile ]==========================
DEBUG   [file: io.cpp] [line: 364] : batch_norm      	90		2.14848
DEBUG   [file: io.cpp] [line: 364] : box_coder       	85		2.02912
DEBUG   [file: io.cpp] [line: 364] : concat          	144		3.43757
DEBUG   [file: io.cpp] [line: 364] : conv2d          	87		2.07687
DEBUG   [file: io.cpp] [line: 364] : depthwise_conv2d	2708		64.6455
DEBUG   [file: io.cpp] [line: 364] : elementwise_add 	25		0.596801
DEBUG   [file: io.cpp] [line: 364] : feed            	68		1.6233
DEBUG   [file: io.cpp] [line: 364] : fetch           	13		0.310337
DEBUG   [file: io.cpp] [line: 364] : multiclass_nms  	97		2.31559
DEBUG   [file: io.cpp] [line: 364] : prior_box       	52		1.24135
DEBUG   [file: io.cpp] [line: 364] : relu            	18		0.429697
DEBUG   [file: io.cpp] [line: 364] : reshape         	24		0.572929
DEBUG   [file: io.cpp] [line: 364] : softmax         	243		5.80091
DEBUG   [file: io.cpp] [line: 364] : transpose       	535		12.7715
DEBUG   [file: io.cpp] [line: 368] : ========================[         ]==========================