Some people may clone the cgit repository and compile within a sandbox
or on another machine where git is not necessarily installed. When it
happens, cgit is getting compiled with an empty version number.
This commit fixes this.
Replacing '-' with '.' makes the version name slightly confusing, so lets
stick with the unmodified output of git describe.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
A new script, gen-version.sh, is now invoked from 'make version' to generate
the file VERSION. This file contains a version identifier generated by
git-describe and is included in the Makefile.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
