[Bug driver/106897] New: driver: support -gz=zstd

[i at maskray dot me via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106897

            Bug ID: 106897
           Summary: driver: support -gz=zstd
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: i at maskray dot me
  Target Milestone: ---

Translate -gz=std to --compress-debug-sections=zstd for as and ld. This
requires that binutils supports zstd, feature request:
https://sourceware.org/bugzilla/show_bug.cgi?id=29397