svnkit 1.1.3 is no longer available from the svnkit site (redirects to the front page). It looks like they've done something weird to the package directory naming (it's called svnkit-1.1.7.4142), so a straight bump won't work.
Fixed in overlay by James Le Cuirot. See: http://overlays.gentoo.org/proj/java/changeset/6298 http://overlays.gentoo.org/proj/java/changeset/6418