[13] RFR: Request to sync April 2019 CPU changes into jfx-dev

[Kevin Rushforth]

Johan and Phil,

I request approval to sync changes from to the just-released April 2019 
CPU release into jfx-dev. Here is the aggregate webrev for the fixes:

http://cr.openjdk.java.net/~kcr/cpu-1904-sync/jfx-dev/webrev/

-- Kevin