overlay sys-apps/baselayout: Don't create empty /etc configs

There is a bug in coreos baselayout which wipes
/etc/{group,gshadow,passwd,shadow} when
reinstalling/removing/upgrading the baselayout package.

The deleted files are touched in staging area, so the package ships
empty configuration files, overwriting the original configs on the
system. Instead we move the touch to postinst, which only touches the
existing files (or creates them when they're nonexistent).

Author: danzatt

…s/baselayout/baselayout-3.6.8-r16.ebuild …s/baselayout/baselayout-3.6.8-r17.ebuildsdk_container/src/third_party/coreos-overlay/sys-apps/baselayout/baselayout-3.6.8-r16.ebuild renamed to sdk_container/src/third_party/coreos-overlay/sys-apps/baselayout/baselayout-3.6.8-r17.ebuild sdk_container/src/third_party/coreos-overlay/sys-apps/baselayout/baselayout-3.6.8-r16.ebuild renamed to sdk_container/src/third_party/coreos-overlay/sys-apps/baselayout/baselayout-3.6.8-r17.ebuild

@@ -101,10 +101,6 @@ pkg_preinst() {
 	emake -C "${ED}/usr/share/${PN}" DESTDIR="${EROOT}" LIBDIRS="${libdirs}" layout
 	SYSTEMD_JOURNAL_GID=${ACCT_GROUP_SYSTEMD_JOURNAL_ID:-190} ROOT_UID=0 ROOT_GID=0 CORE_UID=500 CORE_GID=500 DESTDIR=${D} "${ED}/usr/share/${PN}/dumb-tmpfiles-proc.sh" "${ED}/usr/lib/tmpfiles.d" || die
 	rm -f "${ED}/usr/share/${PN}/Makefile" "${ED}/usr/share/${PN}/dumb-tmpfiles-proc.sh" || die
-
-	# The default passwd/group files must exist for some ebuilds
-	touch "${ED}/etc/"{group,gshadow,passwd,shadow}
-	chmod 640 "${ED}/etc/"{gshadow,shadow}
 }
 
 pkg_postinst() {
@@ -131,4 +127,8 @@ pkg_postinst() {
 		# symlinks.
 		mkdir -p "${ROOT}/oem"
 	fi
+
+	# The default passwd/group files must exist for some ebuilds
+	touch "${EROOT}/etc/"{group,gshadow,passwd,shadow}
+	chmod 640 "${EROOT}/etc/"{gshadow,shadow}
 }