testevdev: Try to correct Wii devices guessed from kernel source

The comments here disagreed with the actual bytes. According to
https://elixir.bootlin.com/linux/v6.3.7/source/drivers/hid/hid-wiimote-modules.c,
the Balance Board reports BTN_A and ABS_HAT0X, HAT0Y, HAT1X and HAT1Y.
This means the comments here were correct, but the .abs bits shown
were in the wrong byte.

Matching the Wii U Pro Controller against the same kernel source, it
appears to be correct: it's the same representation as a PS3 gamepad,
except that it lacks the Z and RZ axes for analogue triggers.

Signed-off-by: Simon McVittie <smcv@collabora.com>

test/testevdev.c

@@ -1073,22 +1073,24 @@ static const GuessTest guess_tests[] =
       },
     },
     {
-      /* Flags guessed from kernel source code */
+      /* Flags guessed from kernel source code, not confirmed with real
+       * hardware */
       .name = "Wiimote - Balance Board",
       /* TODO: Should this be JOYSTICK? */
       .expected = SDL_UDEV_DEVICE_UNKNOWN,
       /* SYN, KEY, ABS */
       .ev = { 0x0b },
       /* Hat 0-1 */
-      .abs = { 0x00, 0x0f },
+      .abs = { 0x00, 0x00, 0x0f },
       .keys = {
           /* 0x00-0xff */ ZEROx8, ZEROx8, ZEROx8, ZEROx8,
-          /* A */
+          /* BTN_A */
           /* 0x100 */ ZEROx4, 0x00, 0x00, 0x01, 0x00,
       },
     },
     {
-      /* Flags guessed from kernel source code */
+      /* Flags guessed from kernel source code, not confirmed with real
+       * hardware */
       .name = "Wiimote - Wii U Pro Controller",
       .expected = SDL_UDEV_DEVICE_JOYSTICK,
       /* SYN, KEY, ABS */