fix: pkg: updated autogen.sh to avoid barfing at travis and users that wouldn't have ``gitchangelog``.
fix: pkg: updated autogen.sh to avoid barfing at travis and users that wouldn't have ``gitchangelog``.

sampathinturi/shyaml,alexlance/shyaml,alexlance/shyaml,trcook/shyaml,orangesignal/shyaml,trcook/shyaml,sampathinturi/shyaml,orangesignal/shyaml,0k/shyaml,beni55/shyaml,beni55/shyaml,0k/shyaml