app-text/xan: fix and improve the logic of the live ebuild template

I made a mass depfiles conversion to a lot of packages a while ago, and
most of the changes were reverted in
https://github.com/gentoo/guru/pull/354

However, the depfiles in this ebuild went unnoticed by me, so the logic
was fixed: use CRATES instead of depfiles

I also added `RESTRICT="mirror"` which were recommended to me in the IRC
back when the discussion was made on my mass creation of depfiles, this
way, portage shouldn't check for a mirror each time for hundreds of rust
CRATES

Signed-off-by: ingenarel <ingenarelitems@gmail.com>

app-text/xan/xan-9999.ebuild

@@ -21,9 +21,9 @@ if [[ "${PV}" == *9999* ]]; then
 	}
 else
 	SRC_URI="https://github.com/medialab/xan/archive/${PV}.tar.gz -> ${P}.tar.gz"
-	SRC_URI+=" https://github.com/ingenarel/guru-depfiles/releases/download/${P}-deps.tar.xz/${P}-deps.tar.xz"
+	SRC_URI+=" ${CARGO_CRATE_URIS}"
 	KEYWORDS="~amd64"
-	ECARGO_VENDOR="${WORKDIR}/vendor"
+	RESTRICT="mirror"
 fi
 
 LICENSE="|| ( MIT Unlicense )"