DEVELOPERS: add Sen Hastings for systemd and pkg-stats

Signed-off-by: Sen Hastings <sen@phobosdpl.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit 1097580de7a9489065a0c53e3fc87f822badd37b)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -2551,6 +2551,10 @@ F:	package/libbson/
 F:	package/lua-resty-http/
 F:	package/mpir/
 
+N:	Sen Hastings <sen@phobosdpl.com>
+F:	package/systemd
+F:	support/scripts/pkg-stats
+
 N:	Sergey Bobrenok <bobrofon@gmail.com>
 F:	package/sdbus-cpp/