(xmlsec-core) Added signature result verification to the examples (#865) #1363

Job	Run time
check-mingw (MINGW64, x86_64)	15m 55s
check-ubuntu	3m 37s
check-mingw (MINGW64, x86_64, --enable-static --enable-static-linking --enable-unicode=no --witho...	7m 51s
check-osx	5m 25s
check-ubuntu (--enable-legacy-features --enable-ftp --enable-http)	4m 0s
check-msvc (mscng, unicode=yes with-dl=yes)	2m 39s
check-ubuntu (--enable-static --enable-static-linking --disable-openssl3-engines --without-nss --...	2m 5s
check-msvc (mscng, unicode=no with-dl=no static=yes legacy-features=yes)	2m 36s
check-ubuntu (--enable-static --enable-static-linking --without-openssl --without-nss --without-g...	1m 18s
check-msvc (mscrypto)	2m 17s
check-ubuntu-openssl-111	1m 26s
check-msvc (mscrypto, unicode=no with-dl=no static=yes legacy-features=yes)	2m 1s
check-ubuntu-openssl-111 (--enable-static --enable-static-linking --without-nss --without-gnutls ...	1m 7s
check-msvc (openssl-300)	6m 48s
check-msvc (openssl-300, unicode=no with-dl=no static=yes)	6m 19s
	1h 5m 24s

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