8927 sadb_x_kmc_t's KM cookie should be 64-bits (fix improper upstream)

@@ -13,11 +13,11 @@
 
 #
 # Copyright (c) 2017 Joyent, Inc.
 #
 
-if [ `id -u` -ne 0 ]; then
+if [[ `id -u` -ne 0 ]]; then
         echo "Need to be root or have effective UID of root."
         exit 255
 fi
 
 #