CRYPTOCB_ONLY: add test infra + SHA256 + AES #6965

Job	Run time
build library (--disable-intelasm --enable-cryptonly --enable-all-crypto --disable-examples --dis...	57s
build library (--enable-cryptonly --enable-all-crypto --disable-examples --disable-benchmark --di...	55s
build library (--enable-smallstack --disable-asm --enable-cryptonly --enable-all-crypto --disable...	59s
build library (--enable-cryptonly --enable-all-crypto --disable-examples --disable-benchmark --di...	57s
build library (--enable-smallstack --enable-cryptonly --enable-all-crypto --disable-examples --di...	1m 9s
build library (--disable-intelasm --enable-cryptonly --enable-all-crypto --disable-examples --dis...	1m 4s
build library (--enable-intelasm --enable-cryptonly --enable-all-crypto --disable-examples --disa...	1m 15s
build library (--disable-asm --enable-cryptonly --enable-all-crypto --disable-examples --disable-...	58s
build library (--enable-cryptonly --enable-all-crypto --disable-examples --disable-benchmark --di...	1m 2s
build library (--enable-smallstack --enable-intelasm --enable-cryptonly --enable-all-crypto --dis...	1m 5s
build library (--enable-cryptonly --enable-all-crypto --disable-examples --disable-benchmark --di...	1m 5s
	11m 26s

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