rpms: add hgext3rd to mercurial.spec
Otherwise build process fails with somethings like this:
RPM build errors:
Installed (but unpackaged) file(s) found:
/usr/lib64/python2.7/site-packages/hgext3rd/__init__.py
/usr/lib64/python2.7/site-packages/hgext3rd/__init__.pyc
/usr/lib64/python2.7/site-packages/hgext3rd/__init__.pyo
make: *** [docker-fedora20] Error 1
#!/usr/bin/env python
#
# An example hgweb CGI script, edit as necessary
# See also https://mercurial-scm.org/wiki/PublishingRepositories
# Path to repo or hgweb config to serve (see 'hg help hgweb')
config = "/path/to/repo/or/config"
# Uncomment and adjust if Mercurial is not installed system-wide
# (consult "installed modules" path from 'hg debuginstall'):
#import sys; sys.path.insert(0, "/path/to/python/lib")
# Uncomment to send python tracebacks to the browser if an error occurs:
#import cgitb; cgitb.enable()
from mercurial import demandimport; demandimport.enable()
from mercurial.hgweb import hgweb, wsgicgi
application = hgweb(config)
wsgicgi.launch(application)