Whitespace cleanup in emcc.

emcc

@@ -704,7 +704,6 @@ try:
     pre_js += open(shared.path_from_root('src', 'emrun_prejs.js')).read() + '\n'
     post_js += open(shared.path_from_root('src', 'emrun_postjs.js')).read() + '\n'
 
-
   if js_opts is None: js_opts = opt_level >= 2
   if llvm_opts is None: llvm_opts = LLVM_OPT_LEVEL[opt_level]
   if opt_level == 0: debug_level = max(3, debug_level)