Add security override for sha1 #3644

Job	Run time
cmake-offline-googletest	4m 15s
cmake-offline-googletest-src	4m 12s
system-sexpp, sexpp shared libs on, rnp shared libs on	2m 44s
package-source	28s
system-sexpp, sexpp shared libs on, rnp shared libs off	3m 1s
system-sexpp, sexpp shared libs off, rnp shared libs on	3m 11s
ubuntu-latest [CC gcc; botan; shared libs on; GnuPG stable]	4m 13s
system-sexpp, sexpp shared libs off, rnp shared libs off	2m 56s
ubuntu-latest [CC clang; botan; shared libs on; GnuPG stable]	4m 22s
ubuntu-latest [CC gcc; openssl; shared libs on; GnuPG stable]	4m 13s
ubuntu-latest [CC clang; openssl; shared libs on; GnuPG stable]	3m 54s
ubuntu-20.04 [CC gcc; openssl; shared libs on; GnuPG stable]	3m 55s
ubuntu-latest [CC gcc; botan; shared libs off; GnuPG stable]	4m 11s
package	52s
debian-tests	8s
	46m 35s

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