net-misc/ntp: Sync with Gentoo

It's from Gentoo commit b8a317d7d13fff42816a55097af515737ec1c095.

sdk_container/src/third_party/portage-stable/net-misc/ntp/ntp-4.2.8_p17.ebuild

@@ -13,7 +13,7 @@ S="${WORKDIR}/${MY_P}"
 
 LICENSE="HPND BSD ISC"
 SLOT="0"
-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="caps debug ipv6 openntpd parse-clocks readline samba selinux snmp ssl +threads vim-syntax zeroconf"
 
 DEPEND="
@@ -75,6 +75,8 @@ src_configure() {
 	export PATH_RUBY=/bin/false
 
 	local myeconfargs=(
+		--cache-file="${S}"/config.cache
+
 		--with-lineeditlibs=readline,edit,editline
 		--with-yielding-select
 		--disable-local-libevent