gcc also takes generates a random number in some special circumstances,
so teach it about /dev/urandom too.

gcc/:

2011-09-27   Andi Kleen <ak@linux.intel.com>

	* gcc.c (get_local_tick). Rename to get_random_number.
        Read from /dev/urandom.
	Add getpid call.
	(compare_debug_dump_opt_spec_function): Drop getpid call.

From-SVN: r179349