x11-misc/numlockx: fix SRC_URI

Upstream is long gone and this was relying on the file still being
mirror'ed to provide it but, since the layout changes on the mirrors,
all these links are dead. Give it a permanent location instead.

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

x11-misc/numlockx/numlockx-1.2.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2025 Gentoo Authors
+# Copyright 1999-2026 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -7,7 +7,7 @@ inherit autotools
 
 DESCRIPTION="Changes keyboard's numlock state under X"
 HOMEPAGE="https://wiki.gentoo.org/wiki/No_homepage"
-SRC_URI="mirror://gentoo/${P}.tar.gz"
+SRC_URI="https://distfiles.gentoo.org/pub/dev/ionen@gentoo.org/${P}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
@@ -16,10 +16,12 @@ KEYWORDS="~alpha amd64 ~arm ppc ppc64 ~riscv ~sparc x86"
 RDEPEND="
 	x11-libs/libX11
 	x11-libs/libXext
-	x11-libs/libXtst"
+	x11-libs/libXtst
+"
 DEPEND="
 	${RDEPEND}
-	x11-base/xorg-proto"
+	x11-base/xorg-proto
+"
 
 src_prepare() {
 	default