Add svnlite.1 to CLEANFILES.

MFC after:	3 days
X-MFC-To:	stable/10 only
Sponsored by:	The FreeBSD Foundation


git-svn-id: svn+ssh://svn.freebsd.org/base/head@270672 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f