Fix Windows CI failures. #3247

Job	Run time
cmake-offline-googletest-src	2m 1s
ubuntu-latest [CC gcc; botan; shared libs on; GnuPG stable]	1m 57s
ubuntu-latest [CC clang; botan; shared libs on; GnuPG stable]	3m 6s
ubuntu-latest [CC gcc; openssl; shared libs on; GnuPG stable]	1m 53s
ubuntu-latest [CC clang; openssl; shared libs on; GnuPG stable]	1m 46s
ubuntu-20.04 [CC gcc; openssl; shared libs on; GnuPG stable]	1m 57s
ubuntu-latest [CC gcc; botan; shared libs off; GnuPG stable]	2m 0s
cmake-offline-googletest	3m 29s
package-source	28s
system-sexpp, sexpp shared libs on, rnp shared libs on	2m 3s
system-sexpp, sexpp shared libs on, rnp shared libs off	2m 30s
system-sexpp, sexpp shared libs off, rnp shared libs on	1m 58s
system-sexpp, sexpp shared libs off, rnp shared libs off	3m 3s
package	1m 19s
debian-tests	14s
	29m 44s

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