RFC: Pick up 11.0.4+4 to sh/jdk11

[Aleksey Shipilev]

The trivial merge from jdk-updates/jdk11u, at 11.0.4+4. Since there are no Hotspot changes to care
about, and no Shenandoah changes since last tag, I would tag it immediately as shenandoah-jdk-11.0.4+4.

Changesets:
  http://cr.openjdk.java.net/~shade/shenandoah/merges/jdk11-11.0.4%2b4/changesets.txt

Testing: hotspot_gc_shenandoah {fastdebug|release}

-- 
Thanks,
-Aleksey