Display timestamp, useful to find timing problem #686

Job	Run time
Check lib (x86_64-unknown-linux-gnu)	34s
Clippy (x86_64-unknown-linux-gnu)	2m 54s
Check lib (aarch64-unknown-linux-gnu)	1m 50s
Check lib MSRV (x86_64-unknown-linux-gnu)	30s
Clippy (aarch64-unknown-linux-gnu)	3m 45s
Check lib (armv7-unknown-linux-gnueabihf)	1m 31s
Check lib MSRV (aarch64-unknown-linux-gnu)	1m 24s
Check (x86_64-apple-darwin)	37s
Clippy (armv7-unknown-linux-gnueabihf)	3m 25s
Check lib MSRV (armv7-unknown-linux-gnueabihf)	1m 34s
Check (x86_64-unknown-linux-gnu)	26s
Check (x86_64-unknown-linux-musl)	43s
Rustfmt	10s
Check (x86_64-pc-windows-msvc)	3m 27s
Unit Tests (x86_64-unknown-linux-gnu)	37s
Check (aarch64-unknown-linux-gnu)	1m 59s
Unit Tests (aarch64-unknown-linux-gnu)	1m 28s
Check (armv7-unknown-linux-gnueabihf)	1m 46s
Unit Tests (armv7-unknown-linux-gnueabihf)	1m 15s
	29m 55s

Provide feedback