[retro-gtk] keyboard-key: Implement '{', '|', '}' and '~'

[Adrien Plazas <aplazas src gnome org>]

commit 5c761f0be5b69fe1e21fb4cbe8d6f9cb76b6207a
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri May 4 12:21:21 2018 +0200

    keyboard-key: Implement '{', '|', '}' and '~'
    
    Add the Libretro symbols for these four keys. These being US-ASCII
    characters, they were already handled by the code handling all of them.
    
    Also update UNIMPLEMENTED.md accordingly.

 UNIMPLEMENTED.md               | 9 ---------
 retro-gtk/retro-keyboard-key.h | 4 ++++
 2 files changed, 4 insertions(+), 9 deletions(-)
---
diff --git a/UNIMPLEMENTED.md b/UNIMPLEMENTED.md
index c9c2a22..4e6a886 100644
--- a/UNIMPLEMENTED.md
+++ b/UNIMPLEMENTED.md
@@ -658,15 +658,6 @@ Input device capabilities are implemented by
 
 ## Keyboard
 
-The following keys are undefined:
-
-```
-RETROK_LEFTBRACE      = 123,
-RETROK_BAR            = 124,
-RETROK_RIGHTBRACE     = 125,
-RETROK_TILDE          = 126,
-```
-
 The following symbols are defined but unused:
 
 ```
diff --git a/retro-gtk/retro-keyboard-key.h b/retro-gtk/retro-keyboard-key.h
index 04b1037..f9ce061 100644
--- a/retro-gtk/retro-keyboard-key.h
+++ b/retro-gtk/retro-keyboard-key.h
@@ -84,6 +84,10 @@ typedef enum {
   RETRO_KEYBOARD_KEY_x = 120,
   RETRO_KEYBOARD_KEY_y = 121,
   RETRO_KEYBOARD_KEY_z = 122,
+  RETRO_KEYBOARD_KEY_LEFTBRACE = 123,
+  RETRO_KEYBOARD_KEY_BAR = 124,
+  RETRO_KEYBOARD_KEY_RIGHTBRACE = 125,
+  RETRO_KEYBOARD_KEY_TILDE = 126,
   RETRO_KEYBOARD_KEY_DELETE = 127,
   RETRO_KEYBOARD_KEY_KP0 = 256,
   RETRO_KEYBOARD_KEY_KP1 = 257,