I'm just calling the underlying `make rw.package` here.
RIFT_PACKAGE_GENERATOR is the variable that controls which types of
packages are generated.
Version numbering uses git describe, which isn't always accurate, but
seems to be reliable enough inside of a CI build system.
Change-Id: I2f6b7f2773fddaf98979b8a51debd01eb853bf24
Signed-off-by: Wesley Hirsch <wesley.hirsch@riftio.com>