Enable systemd-journald log target in debian + rpm packaging

Given that all the distributions we support are shipping systemd
anyway, this will not really introduce any additional runtime package
dependencies.

Change-Id: Ib3af918cd4cc8d0ca6d228a0f2c8338534374d46
diff --git a/debian/control b/debian/control
index 24e729a..05069c5 100644
--- a/debian/control
+++ b/debian/control
@@ -18,6 +18,7 @@
                libsctp-dev,
                libusb-1.0-0-dev,
                libmnl-dev,
+               libsystemd-dev,
                python3:native
 Standards-Version: 3.9.8
 Vcs-Git: git://git.osmocom.org/libosmocore.git