hg: jdk9/hs-rt/hotspot: 8152916: ostream has unnecessary dependency on GCId

[kim.barrett at oracle.com]

Changeset: 36a42531fbe9
Author:    kbarrett
Date:      2016-03-29 16:21 -0400
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/36a42531fbe9

8152916: ostream has unnecessary dependency on GCId
Summary: Removed unneeded #includes and forward class declaration.
Reviewed-by: pliden, rehn, brutisso, mgerdin

! src/share/vm/utilities/ostream.cpp
! src/share/vm/utilities/ostream.hpp