Defines starting with `g' in 321/game

• GAME_API_VERSION 321/game/game.h:23
• GAME_INCLUDE 321/game/g_local.h:27
• GAMEVERSION 321/game/g_local.h:31
• GIB_METALLIC 321/game/g_local.h:124
• GIB_ORGANIC 321/game/g_local.h:123
• GRENADE_MAXSPEED 321/game/p_weapon.c:544
• GRENADE_MINSPEED 321/game/p_weapon.c:543
• GRENADE_TIMER 321/game/p_weapon.c:542