Increase compilation speed by 2x

One simple command line option change for much better compile speed. See: https://code.google.com/p/closure-compiler/wiki/FAQ#What_are_the_recommended_Java_VM_command-line_options?

Author: feross

ClosureCompiler.js

@@ -151,7 +151,7 @@
         delete options["js"];
         delete options["js_output_file"];
 
-        var args = '-jar "'+__dirname+'/compiler/compiler.jar"';
+        var args = '-client -d32 -jar "'+__dirname+'/compiler/compiler.jar"';
 
         // Source files
         if (!(files instanceof Array)) {