version request: openjdk.org@8

[fengjianyun]

We have a project to maintain, which is still under Java 8. Can you kindly add Java 8 to pkgx, thank you !

[jhheider]

looks like no darwain/aarch64, but i should be able to build the others.

[jhheider]

still working out the kinks. 2014 was a while ago ;)