rpm/statsite.spec: update BuildRequires, %build steps.
rpm/statsite.spec: update BuildRequires, %build steps.

- BuildRequires to include autoconf, libtool utils
- Run ./autogen, %configure in %build stage.

sleepybishop/statsite,statsite/statsite,sleepybishop/statsite,statsite/statsite,armon/statsite,statsite/statsite,statsite/statsite,sleepybishop/statsite,statsite/statsite,armon/statsite,sleepybishop/statsite,armon/statsite,armon/statsite,armon/statsite,sleepybishop/statsite