LU-85 build: update main bug report URL

Update bug reporting URL in autoconf and other documentation
to reflect source of release.

Change-Id: I7a4017bd55e9e3f8de6adca0e9a030c94f0db9ec
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-on: http://review.whamcloud.com/971


Tested-by: Hudson
Reviewed-by: Brian J. Murrell <brian@whamcloud.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>