Added clean-symbols option

Going to add the actual logic for it later

premake5.lua

@@ -9,6 +9,11 @@ newoption {
 	}
 }
 
+newoption {
+	trigger = "clean-symbols",
+	description = "Cleans up the symbol table from unused symbols"
+}
+
 -- main workspace
 workspace "ssc"
 	configurations { "Debug", "Release" }
@@ -37,6 +42,8 @@ workspace "ssc"
 		-- apply options
 		filter "options:var-alloc=pack"
 			defines { "SSC_PACK_VARS" }
+		filter "options:clean-symbols"
+			defines { "SSC_CLEAN_SYMBOLS" }
 		filter {}
 
 		files {

readme.md

@@ -52,6 +52,7 @@ There are also several compile-time options which are able to be configured via
 |Option|Description|
 |------|-----------|
 |var-alloc|Affects how variables are allocated slices. Available values are _pack_ and _inc_.|
+|clean-symbols|Cleans symbol table of unused symbols.|
 
 _**Note:** A Java runtime compatible with JDK 1.5 is required for generating the Grammatica parser classes during compilation.
 For more information, see Grammatica's official [installation documentation](http://grammatica.percederberg.net/doc/release/install.html)._