[PATCH] Skip run-readelf-compressed.sh test if built without bzip2

[Frank Ch. Eigler]

Hi -

> It might just be git am. It does display fine in my mua too, it is just
> git am doesn't seem to like the raw message:
> 
> https://sourceware.org/cgi-bin/get-raw-msg?listname=elfutils-devel&date=2019-q1&msgid=67ff4de2-fd5a-0ba8-0b5d-173c5619a88b%40qt.io

That could be because of sourceware's anti-spammer mangling of the
addresses in email headers.  I don't know if this is worth keeping,
but I use this pipeline for applying get-raw-msg? outputs:

   wget -q -O - "$f" | sed '/^From:/s/ at /@/' | sed '/^From:/s/ dot /./g' | git am

- FChE