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

emulators/yuzu/Makefile

@@ -52,6 +52,7 @@ GH_TUPLE=	yuzu-emu:unicorn:1.0.1-153-g73f45735:unicorn/externals/unicorn \
 USES=		cmake compiler:c++17-lang iconv localbase:ldflags \
 		python:build sdl ssl
 USE_SDL=	sdl2
+CMAKE_OFF=	ENABLE_GNUTLS ENABLE_MBEDTLS
 CXXFLAGS+=	-Wno-narrowing # https://github.com/yuzu-emu/yuzu/issues/3407
 LDFLAGS+=	-Wl,--as-needed # Qt5Network
 TEST_TARGET=	test