RFR: 8256430: add linux-x64-optimized to regular testing [v2]

[Igor Ignatyev]

> Hi all,
> 
> 
> [8256414](https://bugs.openjdk.java.net/browse/JDK-8256414) /  #1233 added similar profile to submit workflow, this patch defines `linux-x64-optimized` profile in jib-profile so it can be used by mach5 and added to tier1? 
> 
> Thanks
> -- Igor
> 
> cc-ing @dcubed-ojdk

Igor Ignatyev has updated the pull request incrementally with one additional commit since the last revision:

  build only hotspot for optimized

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/1244/files
  - new: https://git.openjdk.java.net/jdk/pull/1244/files/05c735be..2d861d14

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=1244&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=1244&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1244.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1244/head:pull/1244

PR: https://git.openjdk.java.net/jdk/pull/1244