LU-4319 build: Clean up rpms/srpm Make targets

LU-4319 build: Clean up rpms/srpm Make targets

The "rpms" and "srpm" targets were unnecessarily complicated.  The rpms
target in particular has a very long shell script embedded in the
autoMakefile, which is not especially desirable.  Because of the embedded
shell script with its associated backslashes, we didn't use standard
autoconf/automake macros because we didn't want shell comments to appear
after line continuation.  To get around that, we need another layer of
variables to convert autoconf/automake variables into Make variables.

It gets rather difficult to read and modify.

Instead we move the scripting into autoconf m4 files, where scripting
is much easier (little line continuations necessary, far fewer escapes needed).
We also have direct access to the original variables, so we don't need
to hop through two or three files before we eventually find where
a variable gets set.

All of the decisions are made at configure time anyway, so constructing
the command line options for rpmbuild at configure time is the Right Thing
to do.

A nice side effect of this change is that one can now easily look at
the autoMakefile after running "./configure" and see exactly the command
line that will be passed to rpmbuild.

Change-Id: I10fcfa740d9e901805615c2262263cc1ea8552bf
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Signed-off-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-on: http://review.whamcloud.com/8426
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>