shared: add random-util.[ch]

src/libsystemd-network/sd-dhcp-client.c

@@ -28,6 +28,7 @@
 
 #include "util.h"
 #include "refcnt.h"
+#include "random-util.h"
 #include "async.h"
 
 #include "dhcp-protocol.h"

src/libsystemd-network/sd-dhcp6-client.c

@@ -28,6 +28,7 @@
 #include "udev-util.h"
 #include "util.h"
 #include "refcnt.h"
+#include "random-util.h"
 
 #include "network-internal.h"
 #include "sd-dhcp6-client.h"

src/libsystemd-network/sd-ipv4ll.c

@@ -27,6 +27,7 @@
 #include "siphash24.h"
 #include "list.h"
 #include "refcnt.h"
+#include "random-util.h"
 
 #include "ipv4ll-internal.h"
 #include "sd-ipv4ll.h"

src/libsystemd-network/sd-pppoe.c

@@ -33,6 +33,7 @@
 #include "event-util.h"
 
 #include "util.h"
+#include "random-util.h"
 #include "socket-util.h"
 #include "async.h"
 #include "refcnt.h"