sysvinit: Only enable recipe in builds where its applicable

Similarly to systemd, only enable the recipe in builds where
sysvinit is configured in DISTRO_FEATURES. This allows the new
cleanup mechanism to handle it correctly in existing builds.

(From OE-Core rev: 7f85e74d5c53b34e5f470967fdbdbd19fed1929a)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/sysvinit/sysvinit_2.88dsf.bb

@@ -100,3 +100,8 @@ do_install () {
 	chown root.shutdown ${D}${base_sbindir}/halt ${D}${base_sbindir}/shutdown
 	chmod o-x,u+s ${D}${base_sbindir}/halt ${D}${base_sbindir}/shutdown
 }
+
+python () {
+    if not bb.utils.contains('DISTRO_FEATURES', 'sysvinit', True, False, d):
+        raise bb.parse.SkipPackage("'sysvinit' not in DISTRO_FEATURES")
+}