gvfs: Disable SMB

Work around the configure error below.

    Run-time dependency smbclient found: NO (tried pkgconfig and cmake)

    meson.build:394:2: ERROR: Dependency "smbclient" not found, tried pkgconfig and cmake

gvfs.be0

@@ -58,6 +58,7 @@ mee_configure() {
         -Dafc=false \
         -Dfuse=false \
         -Dgoa=false \
+        -Dsmb=false \
         -Ddnssd=false
 }