emulators/yuzu-qt5: switch bundled libzip to OpenSSL

Error: /usr/local/bin/yuzu is linked to /usr/local/lib/libgnutls.so.30 from security/gnutls but it is not declared as a dependency
Warning: you need LIB_DEPENDS+=libgnutls.so:security/gnutls
Error: /usr/local/bin/yuzu is linked to /usr/local/lib/libnettle.so.7 from security/nettle but it is not declared as a dependency
Warning: you need LIB_DEPENDS+=libnettle.so:security/nettle