Detect NEON availability #208

Job	Run time
macOS (Universal) / build (Debug)	9m 29s
macOS (Universal) / build (Release)	7m 30s
Linux (x86_64) / build (Debug)	6m 34s
Linux (x86_64) / build (Release)	5m 56s
Android / build (Debug)	3m 10s
Linux (aarch64) / build (Debug)	3m 28s
Android / build (Release)	4m 10s
Windows (x86_64) / build (Debug)	9m 1s
Linux (aarch64) / build (Release)	3m 28s
Windows (x86_64) / build (Release)	8m 41s
iOS / build (Debug)	6m 19s
iOS / build (Release)	5m 26s
	1h 13m 12s

Provide feedback