Update to FreeBSD head 2016-08-23

Git mirror commit 9fe7c416e6abb28b1398fd3e5687099846800cfd.

freebsd/sys/libkern/random.c

@@ -52,7 +52,7 @@ srandom(seed)
 }
 
 /*
- * Pseudo-random number generator for randomizing the profiling clock,
+ * Pseudo-random number generator for perturbing the profiling clock,
  * and whatever else we might use it for.  The result is uniform on
  * [0, 2^31 - 1].
  */