ignore new readnone attribute in llvm 3.4

Author: kripken

src/parseTools.js

@@ -627,7 +627,7 @@ function parseLLVMSegment(segment) {
 }
 
 function cleanSegment(segment) {
-  while (segment.length >= 2 && ['noalias', 'sret', 'nocapture', 'nest', 'zeroext', 'signext'].indexOf(segment[1].text) != -1) {
+  while (segment.length >= 2 && ['noalias', 'sret', 'nocapture', 'nest', 'zeroext', 'signext', 'readnone'].indexOf(segment[1].text) != -1) {
     segment.splice(1, 1);
   }
   return segment;