Required from upstream.

Signed-off-by: Andrea Odetti <mariofutire@gmail.com>

source/linux/keyboard.cpp

@@ -10,6 +10,7 @@ namespace
 {
   std::queue<BYTE> keys;
   BYTE keycode = 0;
+  bool g_bCapsLock = true; //Caps lock key for Apple2 and Lat/Cyr lock for Pravets8
 }
 
 void addKeyToBuffer(BYTE key)
@@ -17,6 +18,11 @@ void addKeyToBuffer(BYTE key)
   keys.push(key);
 }
 
+bool KeybGetCapsStatus()
+{
+  return g_bCapsLock;
+}
+
 BYTE KeybGetKeycode()
 {
   return keycode;