[dev-libs/Ice] use more reasonable subslot

dev-libs/Ice/Ice-3.6.1.ebuild

@@ -24,7 +24,7 @@ HOMEPAGE="http://www.zeroc.com/"
 SRC_URI="https://github.com/zeroc-ice/ice/archive/v${PV}.tar.gz -> ${P}.tar.gz
 	doc? ( http://www.zeroc.com/download/Ice/$(get_version_component_range 1-2)/${P}.pdf )"
 LICENSE="GPL-2"
-SLOT="0/${PV}"
+SLOT="0/36"
 KEYWORDS="~amd64 ~x86"
 IUSE="doc examples libressl +ncurses mono php php_namespaces python ruby test debug"