lang/pocl: Update to 7.0

Introduce new options, pocld remote server with initscript.
Pet portlint, portfmt.

Changelogs:
https://portablecl.org/docs/html/notes_7_0.html
https://portablecl.org/docs/html/notes_6_0.html
https://portablecl.org/docs/html/notes_5_0.html

PR: 287243
Approved by: submitter is maintainer