RFR: [9] Bulk backport to sh/jdk9

[Aleksey Shipilev]

On 11/14/2017 05:19 PM, Aleksey Shipilev wrote:
> http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk9-20171114/webrev.01/
> 
> Fixes:
> 
> rev 13737 : [backport] Disallow pinned_cset region moves and allocations during Full GC
> rev 13738 : [backport] Verifier crashes when reporting multiple forwardings
> rev 13739 : [backport] Report all GC status flags in hs_err

http://cr.openjdk.java.net/~shade/shenandoah/backports/jdk9-20171114/webrev.02/

Updated with two other changesets:

rev 13740 : [backport] Workaround C1 ConstantOopWriteValue bug
rev 13741 : [backport] Verify fwdptr accesses during Full GC moves

Still passes hotspot_gc_shenandoah {fastdebug|release}

Thanks,
-Aleksey