apps_user: fix memory leak

memory passed to the ioctl must be deallocated on use if no longer
required

Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>

src/fastrpc_apps_user.c

@@ -795,6 +795,7 @@ int remote_handle_invoke_domain(int domain, remote_handle handle, uint32_t sc, r
     FARF(HIGH,"debug:sc:%x,handle:%x\n",sc,handle);
 	nErr = ioctl(dev, req, (unsigned long)&invoke);
 bail:
+	free(args);
 	return nErr;
 }