qemu: virtiofs: shorten socket filename

Use just 'fs' instead of 'virtiofsd'.

https://bugzilla.redhat.com/show_bug.cgi?id=1816577

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_virtiofs.c

@@ -56,7 +56,7 @@ qemuVirtioFSCreateSocketFilename(virDomainObjPtr vm,
 {
     qemuDomainObjPrivatePtr priv = vm->privateData;
 
-    return virFileBuildPath(priv->libDir, alias, "-virtiofsd.sock");
+    return virFileBuildPath(priv->libDir, alias, "-fs.sock");
 }