add parameter to build custom shader list

Author: mastercoms

src/materialsystem/stdshaders/buildsdkshaders.bat

@@ -8,4 +8,10 @@ set SOURCE_DIR="..\..\"
 rem Change me to your mod's name!
 set GAME_DIR="..\..\..\game\tc2"
 
-%BUILD_SHADER% stdshader_dx9_30         -game %GAME_DIR% -source %SOURCE_DIR% -force30
+set SHADER_LIST=stdshader_dx9_30
+if "%1"=="" goto build
+
+set SHADER_LIST=%1
+
+:build
+%BUILD_SHADER% %SHADER_LIST% -game %GAME_DIR% -source %SOURCE_DIR% -force30