[Bug bootstrap/67385] New: READELF_FOR_TARGET isn't used in gcc configure

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67385

            Bug ID: 67385
           Summary: READELF_FOR_TARGET isn't used in gcc configure
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

Unlike as, ld, nm and objdump, READELF_FOR_TARGET isn't used in
gcc configure.  Wrong readelf is used when READELF_FOR_TARGET isn't
the same as READELF.