Fix T57059: "make deps" build error when sndio library is present.

build_files/build_environment/cmake/ffmpeg.cmake

@@ -112,6 +112,7 @@ ExternalProject_Add(external_ffmpeg
 		--disable-indev=alsa
 		--disable-outdev=alsa
 		--disable-crystalhd
+		--disable-sndio
 	BUILD_COMMAND ${CONFIGURE_ENV_NO_PERL} && cd ${BUILD_DIR}/ffmpeg/src/external_ffmpeg/ && make -j${MAKE_THREADS}
 	INSTALL_COMMAND ${CONFIGURE_ENV_NO_PERL} && cd ${BUILD_DIR}/ffmpeg/src/external_ffmpeg/ && make install
 	CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${LIBDIR}/ffmpeg ${DEFAULT_CMAKE_FLAGS}

build_files/build_environment/cmake/sdl.cmake

@@ -25,6 +25,7 @@ else()
 		-DSDL_STATIC=ON
 		-DSDL_SHARED=OFF
 		-DSDL_VIDEO=OFF
+		-DSNDIO=OFF
 	)
 endif()