CMake

First step towards DNN optimization for ARMv7 Neon #265

Job	Run time
CMake/Android/So/ARMv8/Release	41s
CMake MINGW	47s
CMake/Android/So/X86/Release	42s
CMake/Android/So/X64/Release	29s
Test build with CMake 3.1.0	58s
CMake/Windows/Dll/X86/Release	58s
CMake/Windows/Dll/X64/Release	40s
CMake/Windows/Dll/ARMv8/Release	39s
CMake/Linux/So/X64/Release	30s
CMake/MacOSX/So/X64/Release	1m 5s
CMake/MacOSX/Framework/X64/Release	1m 26s
CMake/iOS/Dll/arm64/Release	3m 4s
CMake/iOS/Framework/arm64/Release	1m 3s
CMake/Windows/Lib/X86/Release	1m 21s
CMake/Windows/Lib/X64/Release	57s
CMake/Windows/Lib/armv8/Release	1m 4s
CMake/Linux/Lib/X64/Release	1m 7s
CMake/MacOSX/Lib/X64/Release	1m 21s
CMake/iOS/Lib/arm64/Release	2m 59s
CMake/Android/Lib/ARMv8/Release	30s
CMake/Android/Lib/X86/Release	48s
CMake/Android/Lib/X64/Release	36s
CMake/CustomModes/Linux/Lib/X64/Release	1m 8s
CMake/AssertionsFuzz/Windows/Lib/X64/Release	57s
CMake/AssertionsFuzz/Linux/Lib/X64/Release	1m 19s
CMake/AssertionsFuzz/MacOSX/Lib/X64/Release	1m 46s
	28m 55s

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