dev-util/lcov: drop to ~arm64

Indirectly requires media-libs/gd, which has lost its stable arm64 keyword
and fails tests (thus refusing to re-stabilize). lcov is the only leaf
package requiring media-libs/gd that was stable.

Bug: https://bugs.gentoo.org/646904
Package-Manager: Portage-2.3.28, Repoman-2.3.9

dev-util/lcov/lcov-1.9-r1.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2014 Gentoo Foundation
+# Copyright 1999-2018 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI="4"
@@ -11,7 +11,7 @@ SRC_URI="mirror://sourceforge/ltp/${P}.tar.gz"
 
 LICENSE="GPL-2"
 SLOT="0"
-KEYWORDS="amd64 ~arm arm64 ppc x86 ~x86-linux ~x64-macos"
+KEYWORDS="amd64 ~arm ~arm64 ppc x86 ~x86-linux ~x64-macos"
 IUSE=""
 
 DEPEND=""