Jdk8 backports of 6904403 and 8044364

[Andreas Eriksson]

Hi,

Just a heads up that I'm backporting these fixes to jdk8:
https://bugs.openjdk.java.net/browse/JDK-6904403: assert(f == 
k->has_finalizer(),"inconsistent has_finalizer") with debug VM
https://bugs.openjdk.java.net/browse/JDK-8044364: [TESTBUG] 
runtime/RedefineFinalizer test fails on windows

Both of them applies cleanly from the jdk9 changesets (so no review 
required).
http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/c597dc3eb862
http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/29d15865d20f

Unless someone objects I'll get them pushed later today.

- Andreas