build: add the SIBO SDK

code/SIBOSDK/include/p_keyb.h

@@ -0,0 +1,23 @@
+/*	HEADER - P_KEYB.H
+Copyright (C) Psion PLC 1991-92
+ VER    DATE   BY  DESCRIPTION
+===== ======== === ===========
+1.00F 26/04/90 NSM First relase
+1.10F 07/07/92 NSM Second release
+*/
+#ifndef P_KEYB_H
+#define P_KEYB_H
+
+#include <stdepoc.h>
+
+#ifndef _P_CON_KBREC
+#define _P_CON_KBREC
+typedef struct
+{
+unsigned short int keycode; /* Code for the key pressed */ 
+unsigned char modifiers; /* A bit set for each modifier key held down */ 
+unsigned char count;
+} P_CON_KBREC;
+#endif
+
+#endif // P_KEYB_H