restore the init symlink for sysvinit mode

This symlink got lost in the transition to meson.

X-Gentoo-Bug: 850754
X-Gentoo-Bug-URL: https://bugs.gentoo.org/850754

meson.build

@@ -226,4 +226,6 @@ meson.add_install_script('tools/meson_runlevels.sh',
   get_option('sysvinit') ? 'yes' : 'no')
 meson.add_install_script('tools/meson_final.sh',
   rc_libexecdir,
-  os)
+  sbindir,
+  os,
+  get_option('sysvinit') ? 'yes' : 'no')

tools/meson_final.sh

@@ -4,10 +4,15 @@ set -e
 set -u
 
 rc_libexecdir="$1"
-os="$2"
+sbindir="$2"
+os="$3"
+sysvinit="$4"
 
-if [ ${os} != Linux ]; then
+if [ "${os}" != Linux ]; then
 	install -d "${DESTDIR}/${rc_libexecdir}"/init.d
 fi
 install -d "${DESTDIR}/${rc_libexecdir}"/tmp
 install -m 644 "${MESON_BUILD_ROOT}/src/shared/version" "${DESTDIR}/${rc_libexecdir}"
+if [ "${os}" = Linux ] && [ "${sysvinit}" = yes ]; then
+	ln -s openrc-init "${DESTDIR}/${sbindir}"/init
+fi