Fix Windows CI failures. #3246

Job	Run time
cmake-offline-googletest-src	1m 50s
ubuntu-latest [CC gcc; botan; shared libs on; GnuPG stable]	2m 4s
ubuntu-latest [CC clang; botan; shared libs on; GnuPG stable]	2m 28s
ubuntu-latest [CC gcc; openssl; shared libs on; GnuPG stable]	1m 57s
ubuntu-latest [CC clang; openssl; shared libs on; GnuPG stable]	2m 8s
ubuntu-20.04 [CC gcc; openssl; shared libs on; GnuPG stable]	2m 4s
ubuntu-latest [CC gcc; botan; shared libs off; GnuPG stable]	2m 56s
cmake-offline-googletest	4m 25s
system-sexpp, sexpp shared libs on, rnp shared libs on	1m 54s
package-source	43s
system-sexpp, sexpp shared libs on, rnp shared libs off	2m 4s
system-sexpp, sexpp shared libs off, rnp shared libs on	3m 6s
system-sexpp, sexpp shared libs off, rnp shared libs off	1m 56s
package	52s
debian-tests	17s
	30m 44s

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