sys-process/procps: Sync with Gentoo

It's from Gentoo commit 0dab45b41cf2e5f657eae72c6e767add5dec1c30.

Author: Flatcar Buildbot

sdk_container/src/third_party/portage-stable/sys-process/procps/procps-4.0.4.ebuild

@@ -15,8 +15,9 @@ S="${WORKDIR}"/${PN}-ng-${PV}
 # See bug #913210
 LICENSE="GPL-2+ LGPL-2+ LGPL-2.1+"
 SLOT="0/0-ng"
-KEYWORDS="~alpha ~amd64 arm ~arm64 hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux"
+KEYWORDS="~alpha ~amd64 arm ~arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ~ppc64 ~riscv ~s390 sparc ~x86 ~amd64-linux ~x86-linux"
 IUSE="elogind +kill modern-top +ncurses nls selinux static-libs systemd test unicode"
+REQUIRED_USE="unicode? ( ncurses )"
 RESTRICT="!test? ( test )"
 
 DEPEND="