(xmlsec-openssl) Assume all openssl keys are private since we don't have way to check #1349

Job	Run time
check-osx	13m 34s
check-msvc (mscrypto, unicode=yes with-dl=yes ftp=no)	1m 43s
check-osx (--enable-size-t=yes)	14m 41s
check-ubuntu	2m 3s
check-msvc (mscng, unicode=yes with-dl=yes ftp=no)	2m 27s
check-mingw (MINGW64, x86_64, --enable-unicode=yes --enable-size-t=yes)	10m 40s
check-ubuntu (--enable-size-t=yes)	2m 37s
check-msvc (openssl-300, unicode=yes with-dl=yes ftp=no)	4m 29s
check-ubuntu (--enable-static-linking=yes --without-nss --without-gcrypt --without-gnutls)	1m 49s
check-mingw (MINGW64, x86_64, --enable-unicode=yes --enable-size-t=no)	10m 18s
check-ubuntu-openssl-111	1m 8s
check-mingw (MINGW64, x86_64, --enable-unicode=no --enable-size-t=no)	10m 42s
check-msvc (mscrypto, unicode=no with-dl=no ftp=no)	1m 38s
check-ubuntu-openssl-111 (--enable-size-t=yes)	1m 34s
check-msvc (mscng, unicode=no with-dl=no ftp=no)	2m 3s
check-ubuntu-openssl-111 (--enable-static-linking=yes --without-nss --without-gcrypt --without-gn...	1m 1s
check-msvc (openssl-300, unicode=no with-dl=no ftp=no)	4m 5s
	1h 26m 32s

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