Fix a spell mistake
After commented default portable option in `app/meson.build` get some
error and then find this. :)
#define SOCKET_NAME "scrcpy"
#define SERVER_FILENAME "scrcpy-server.jar"
-#define DEFAULT_SERVER_PATH PREFIX "/share/scrcpy/" SERVER_FLENAME
+#define DEFAULT_SERVER_PATH PREFIX "/share/scrcpy/" SERVER_FILENAME
#define DEVICE_SERVER_PATH "/data/local/tmp/" SERVER_FILENAME
static const char *
