Quagga: Fix code to use srandom/random

Quagga was using a mix of srand/rand and srandom/random.
Consolidate to use srandom/random which are the POSIX
versions of random number generators

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
diff --git a/lib/command.c b/lib/command.c
index 3a59f24..641cf20 100644
--- a/lib/command.c
+++ b/lib/command.c
@@ -4144,7 +4144,7 @@
       install_element (VIEW_NODE, &show_work_queues_cmd);
       install_element (ENABLE_NODE, &show_work_queues_cmd);
     }
-  srand(time(NULL));
+  srandom(time(NULL));
 }
 
 static void