RFR (XS) 8223637: PPC64 and S390X build failures after 8223136 (Move compressed oops functions to CompressedOops class)

[Aleksey Shipilev]

Bug:
  https://bugs.openjdk.java.net/browse/JDK-8223637

Fix:
  http://cr.openjdk.java.net/~shade/8223637/webrev.01/

This is hopefully the last build fix to make my CI stop screaming at me. Maybe SAP folks would like
to confirm this fixes builds for them? If I am not responding later, feel free to reassign and push
the fix without me.

Testing: cross-compile without PCH to Linux ppc64 and s390x

-- 
Thanks,
-Aleksey