build lua as c++

lua/premake4.lua

@@ -3,3 +3,8 @@ project "lua"
 
     files { "**.cc", "**.cpp", "**.c", "**.h" }
     excludes { "lua.c", "luac.c" }
+    
+    configuration "vs*"
+        buildoptions { "/TP" }
+    configuration "not vs*"
+        buildoptions { "-x c++" }