Make token available to Lua as a global variable

Reviewed by @RedEnchilada

src/dehacked.c

@@ -8276,6 +8276,9 @@ static inline int lib_getenum(lua_State *L)
 	} else if (fastcmp(word,"VERSIONSTRING")) {
 		lua_pushstring(L, VERSIONSTRING);
 		return 1;
+	} else if (fastcmp(word, "token")) {
+		lua_pushinteger(L, token);
+		return 1;
 	}
 
 	return 0;