Fix tick processor to correctly handle the 'parallel-compiler' tick.

BUG=none
TEST=none

Review URL: https://chromiumcodereview.appspot.com/11347043
Patch from Rajeev Krithivasan <rkrithiv@codeaurora.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12838 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/tickprocessor.js

@@ -231,8 +231,9 @@ TickProcessor.VmStates = {
   JS: 0,
   GC: 1,
   COMPILER: 2,
-  OTHER: 3,
-  EXTERNAL: 4
+  PARALLEL_COMPILER_PROLOGUE: 3,
+  OTHER: 4,
+  EXTERNAL: 5
 };