Fix message when a command times out.

The previous version printed out the nanoseconds elapsed, not seconds.

Change-Id: I10f6d7bf7b7a4647658313ed83781fda6fd744a5
diff --git a/cmds/dumpstate/utils.c b/cmds/dumpstate/utils.c
index e3042eb..81cdd12 100644
--- a/cmds/dumpstate/utils.c
+++ b/cmds/dumpstate/utils.c
@@ -360,7 +360,7 @@
         }
 
         if (timeout_seconds && elapsed / NANOS_PER_SEC > timeout_seconds) {
-            printf("*** %s: Timed out after %ds (killing pid %d)\n", command, (int) elapsed, pid);
+            printf("*** %s: Timed out after %.3fs (killing pid %d)\n", command, (float) elapsed / NANOS_PER_SEC, pid);
             kill(pid, SIGTERM);
             return -1;
         }