LU-7699 build: Convert version underscores to dashes for dpkg

For rpm, we can't have dashes in the version string so we use
underscores.  For dpkg, the requirements are reversed.

In the "debs" make target, we convert underscores in the version
string to dashes.  We also trim down the comment that no longer
really makes sense with the new versioning scheme.

Change-Id: I6d600fc4a16be60c664ef0662b482c31877fbfea
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Reviewed-on: http://review.whamcloud.com/19488


Tested-by: Jenkins
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>

autoMakefile.am

@@ -180,16 +180,9 @@ srpm: @PACKAGE_TARNAME@.spec dist Makefile
 	rm -rf $$rpmbuilddir
 
 # In the debs target, first make sure what's in the changelog reflects
-# the software version.  Here's how we could dig the version out of the
-# autoconf version file directly:
-# lversion=$$(sed -ne 's/m4_define(\[LUSTRE_[A-Z][A-Z]*\],\[\([0-9][0-9]*\)\])$$/\1/p'
-#	lustre/autoconf/lustre-version.ac | tr '\n' '.' | sed -e 's/.$//');
-#
-# However, one cannot really run "make debs" without having done a
-# configure first, so we could use the easier method of digging the
-# version out of the config.h file.
+# the software version.
 debs: undef.h
-	lversion=$$(sed -ne 's/^#define VERSION "\(.*\)"$$/\1/p' config.h); \
+	lversion=$$(echo @VERSION@ | tr '_' '-'); \
 	cversion=$$(sed -ne '1s/^lustre (\(.*\)-[0-9][0-9]*).*$$/\1/p' debian/changelog); \
 	if [ "$$lversion" != "$$cversion" ]; then \
 		echo -e "1i\nlustre ($$lversion-1) unstable; urgency=low\n\n  * Automated changelog entry update\n\n -- Brian J. Murrell <brian@interlinx.bc.ca>  $$(date -R)\n\n.\nwq" | ed debian/changelog; \