[Bug target/67733] elfdump and readelf in perl scripts should to use env vars ELFDUMP and READELF

[ikozhukhov at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67733

--- Comment #2 from Igor Kozhukhov <ikozhukhov at gmail dot com> ---
/usr/ccs links old and unused.
also - illumos != solaris and can use his own layout.
at this moment it's not easy try to move to 'illumos' platform definition
because autotools not ready to define and use it.
illumos is OpenSources platform, but oracle solaris is closed and illumos
binaries incompatible with solaris binaries now.
will be more easy/better to use more universal gcc bootstrap process with
definition what can be using by env vars instead try to patch every gcc
bootstrap for every platform.
these changes not depend on illumos or solaris because we can use tools ELFDUMP
& READELF from different locations and hardcode it is not a good way for others
platforms to use it and hack bootstrap process every time.