Squashed 'build-common/' changes from 72dadf7..667edee

667edee Merge pull request #1 from genome/version-suffix
e4b9115 rename var: CMAKE_VERSION_SUFFIX -> PACKAGE_VERSION_SUFFIX
0ebe40f add support for arbitrary version suffixes

git-subtree-dir: build-common
git-subtree-split: 667edee87f3dc5d44ac2c131c414379bf2880d22
Merge commit 'b1aa02bcc04ede39eade40bd0ae0a107fe1016bb'
Picking up version suffix capabilities.