Distribute auxprogs scripts and data files

Distribute auxprogs scripts and data files

Make sure pybuild.sh, ltp-tester.sh, ltp-apply-patches.sh,
s390-check-opcodes.pl, s390-runone scripts, ltp filters, ltp patches
and pylintrc are added to the dist.

This makes sure users can run the scripts and make ltpchecks not just
from a git checkout, but also from a release or snapshots tar.

Also use the ustar format to package files, the path under
valgrind-x.yy.z/auxprogs/ltp-patches might be larger than 99
chars. automake 1.18 already defaults to the ustar format.