[PATCH] cgraph_edge: small refactoring

[Jan Hubicka]

> Hello.
> 
> Following patch is motivated by seen utilization of cgraph_edge::redirect_callee in Chromium
> compiled with LTO. Thus, I decided to move the function to header file as well as few small
> functions it calls. Changes are just of mechanical nature.
> 
> Patch has been tested on x86_64-linux-pc and no new regression is introduced.

OK. I also see those high in firefox build while doing symbol merging but never actually got the
idea to bring them inline ;)

Honza