build cleanups for 'make distcheck'

See https://github.com/doug-gilbert/sg3_utils/pull/26, 27
and 28; still need svn:ignore property or maybe global-ignores.
More testing/*_dd.c* cleanups for retiring HIPRI and relacing
with POLLED (for calling bio_poll() in kernel).



git-svn-id: https://svn.bingwo.ca/repos/sg3_utils/trunk@975 6180dd3e-e324-4e3e-922d-17de1ae2f315
17 files changed