Subzero: Use a common RelocOffsetType / RelocOffsetT.

There is one in IceDefs.h and one in IceGlobalInits.h. Can we just use one?

BUG=none (mini cleanup)
R=kschimpf@google.com, stichnot@chromium.org

Review URL: https://codereview.chromium.org/695563006
4 files changed