LU-455 Replace DIST_SOURCES with EXTRA_DIST

LU-455 Replace DIST_SOURCES with EXTRA_DIST

Resolve autoconf-2.63 warnings mainly by replacing DIST_SOURCES
with EXTRA_DIST.  Additionally, the non-portable $(shell) contruct
was removed from tests/module.mk and the sources simply enumated.
Finally, the incorrect EXTRA_SOURCES instance was removed from
the top level autoMakefile.am.

  Running automake-1.11 -a -c -W no-portability
  libcfs/libcfs/autoMakefile.am:92:
          variable `DIST_SOURCES' is defined but no program or
  libcfs/libcfs/autoMakefile.am:92:
          library has `DIST' as canonical name (possible typo)
  lnet/klnds/mxlnd/autoMakefile.am:44:
          variable `DIST_SOURCES' is defined but no program or
  lnet/klnds/mxlnd/autoMakefile.am:44:
          library has `DIST' as canonical name (possible typo)
  ...

Also, as a result of the above changes, libcfs/libcfs/autoMakefile.am had to be
modified in order to allow 'make dist' to succeed.

As it turns out, libcfsutils_a_SOURCES was incorrect. That list contained
references to nonexistent 'util/[parser|platform].h' files. The assumption is
it intended to reference libcfs/include/libcfs/util/[parser|platform].h.

To fix the issue, both [parser|platform].h references were removed from the
list. This produces a simple solution that maintains consistency with the rest
of the build system. The caveat being that libcfsutil.a won't automatically be
rebuilt if either of the intended [parser|platform].h files are modified.

Change-Id: Ia81eb1e3fc219f6dac4c7da234f7e736754c5440
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Signed-off-by: Prakash Surya <surya1@llnl.gov>
Reviewed-on: http://review.whamcloud.com/1092
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Richard Henwood <rhenwood@whamcloud.com>
Tested-by: Richard Henwood <rhenwood@whamcloud.com>
Reviewed-by: Brian J. Murrell <brian@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>