For a while now bsdtar is able to autotermine compression and archive format.
Let's then use tar directly instead of piping to tar.
Now USE_BZIP2 and USE_XZ only set EXTRACT_SUFX to the right format
files with less memory. GNU Diff often can not work with files
larger than 33% of datasize (from limit) due to memory exhaustion.
PR: ports/50097
Submitted by: risner@stdio.com