Run tests under panic=abort #792

Job	Run time
minrust	1m 5s
nightly	1m 0s
loom	21s
cross (i686-unknown-linux-gnu)	32s
miri	3h 23m 40s
cross (armv7-unknown-linux-gnueabihf)	28s
panic=abort tests	18s
rustfmt	11s
cross (powerpc-unknown-linux-gnu)	28s
cross (powerpc64-unknown-linux-gnu)	40s
stable (ubuntu-latest)	1m 26s
cross (wasm32-unknown-unknown)	17s
tsan	1m 19s
stable (macos-latest)	1m 33s
stable (windows-latest)	2m 59s
Publish Documentation	13s
	3h 36m 30s

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