Update packaging scripts

This consists of a set of changes allowing proper packaging for the
newer library version. These changes are:

- Use common scripts to deduce version information
- Remove man3 and cbcrc manpages from installation list
- Build with a static snappy on RPM platforms
- Debian platforms require a system-provided libsnappy
- Enhance debian script for paralell building

Change-Id: If9f6e973cd85d9bec6a3208e997bad93a04de62d
Update release notes for 2.4.0-dp1

Change-Id: I01fa8889564212c9d52049206a4de1bf18399531
Update release metadata for 2.4.0-dp1

This bumps up the 'revision' ABI number to 16. The previous was 14, but
a prospective 2.3.2 will be 15

Change-Id: I463a769849aae62868e11f69dbe2d00e0dd80a4b
Update packaging CHANGELOGS

Change-Id: I66e22b96286aafd3d03a6a54270bdb0386a36189