[PATCH] systemd: Track postinst/prerm in task checksum

[Richard Purdie <richard.purdie@linuxfoundation.org>]

When these functions change, the package should rebuild but currently it
does not. We need to add the dependencies manually as the dependency
code can't track dynamically created variables.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
---
diff --git a/meta/classes/systemd.bbclass b/meta/classes/systemd.bbclass
index eab8735..3700b2e 100644
--- a/meta/classes/systemd.bbclass
+++ b/meta/classes/systemd.bbclass
@@ -48,6 +48,9 @@ if type systemctl >/dev/null 2>/dev/null; then
 fi
 }
 
+
+systemd_populate_packages[vardeps] += "systemd_prerm systemd_postinst"
+
 python systemd_populate_packages() {
     if "systemd" not in d.getVar("DISTRO_FEATURES", True).split():
         return