Fix ordering issue with squashed Icache Fetches and Static data in packet.

Fix ordering issue with squashed Icache Fetches and Static data in packet.

Now hello world works with 2 levels of cache with O3 CPU(multiple outstanding requests).

src/cpu/o3/fetch_impl.hh:
    Fix ordering issue with squashed Icache Fetches and Static data in packet.

--HG--
extra : convert_revision : a6adb87540b007ead0b4982cb3f31da8199fb5ca