coreos-base/coreos-init, sys-apps/baselayout: Move installing symlinks

Install some of the symlinks in the baselayout package, instead of
coreos-init. Systemd started installing its private libraries in
/usr/lib64/systemd instead of /usr/lib/systemd which led to the
situation where /usr/lib64/systemd stopped being a symlink to
/usr/lib/systemd and became a separate directory. This could break
compatibility with software that expected things to be in
/usr/lib64/systemd.

Some symlink installation stays in init, though. This is to avoid
having them installed for some oem images where they become dangling.

sdk_container/src/third_party/coreos-overlay/coreos-base/coreos-init/coreos-init-9999.ebuild

@@ -55,8 +55,7 @@ src_install() {
 
 	# Create compatibility symlinks in case /usr/lib64/ instead of /usr/lib/ was used
 	local compat
-	# os-release symlink is set up in scripts
-	for compat in modules systemd flatcar coreos kernel modprobe.d pam pam.d sysctl.d udev ; do
+	for compat in modules flatcar coreos ; do
 		dosym "../lib/${compat}" "/usr/lib64/${compat}"
 	done
 }

sdk_container/src/third_party/coreos-overlay/sys-apps/baselayout/baselayout-9999.ebuild

@@ -242,4 +242,15 @@ pkg_postinst() {
 		mkdir -p "${ROOT}/etc/init.d"
 		ln -sf "${func}" "${ROOT}/etc/init.d/functions.sh"
 	fi
+	# install compat symlinks in production images, not in SDK
+	# os-release symlink is set up in scripts
+	if ! use cros_host; then
+		local compat libdir
+		for compat in systemd kernel modprobe.d pam pam.d sysctl.d udev ; do
+			for libdir in $(get_all_libdirs) ; do
+				if [[ "${libdir}" == 'lib' ]]; then continue; fi
+				ln -sfT "../lib/${compat}" "${ROOT}/usr/${libdir}/${compat}"
+			done
+		done
+	fi
 }