New badness metric for inliner

[David Miller]

From: Jan Hubicka <hubicka@ucw.cz>
Date: Tue, 6 Nov 2012 19:21:46 +0100

> The problem here is really that MAX_TIME * MAX_FREQ do not fit into 32bit integer. Fixed thus.
> 
> 	* ipa-inline.c (compute_uninlined_call_time): Return gcov_type.
> 	(compute_inlined_call_time): Watch overflows.
> 	(relative_time_benefit): Compute in gcov_type.

Thanks Jan, I'll test this right now.