Exclude GDScriptSyntaxHighlighter from non-tool builds

modules/gdscript/SCsub

@@ -7,4 +7,7 @@ env_gdscript = env_modules.Clone()
 
 env_gdscript.add_source_files(env.modules_sources, "*.cpp")
 
+if env['tools']:
+	env_gdscript.add_source_files(env.modules_sources, "./editor/*.cpp")
+
 Export('env')

modules/gdscript/register_types.cpp

@@ -30,8 +30,8 @@
 
 #include "register_types.h"
 
+#include "editor/gdscript_highlighter.h"
 #include "gdscript.h"
-#include "gdscript_highlighter.h"
 #include "gdscript_tokenizer.h"
 #include "io/file_access_encrypted.h"
 #include "io/resource_loader.h"