[gnome-games] gamepad-mapping-builder: Fix the comment

[Alexander Mikhaylenko <alexm src gnome org>]

commit b0a488d9160c66f1290369c35ea1d3fa0e26d511
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Fri Feb 28 01:57:22 2020 +0500

    gamepad-mapping-builder: Fix the comment

 src/gamepad/gamepad-mapping-builder.vala | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/gamepad/gamepad-mapping-builder.vala b/src/gamepad/gamepad-mapping-builder.vala
index 487f8068..54ad40cf 100644
--- a/src/gamepad/gamepad-mapping-builder.vala
+++ b/src/gamepad/gamepad-mapping-builder.vala
@@ -15,8 +15,8 @@ private class Games.GamepadMappingBuilder : Object {
        // At the same time, /usr/include/linux/input-event-codes.h uses
        // Xbox order for A and B, and Nintendo/libretro order for X and Y:
        //
-       //   (Y)
-       // (X) (B)
+       //   (X)
+       // (Y) (B)
        //   (A)
        //
        // As a result, we swap X and Y buttons to match Xbox order