[PATCH] util.h: fix gcc version checking

[Matt Mackall]

On Thu, 2013-09-19 at 09:57 -0700, Siddharth Agarwal wrote:
> # HG changeset patch
> # User Siddharth Agarwal <sid0 at fb.com>
> # Date 1379609100 25200
> #      Thu Sep 19 09:45:00 2013 -0700
> # Node ID a14b158920b990f6e65632767b59ed7cccc80858
> # Parent  1b592791351d126d8af39f70bbc63a707a11a75f
> util.h: fix gcc version checking
> 
> gcc doesn't have a predefined GCC_VERSION macro.

Queued for default, thanks.

-- 
Mathematics is the supreme nostalgia of our time.