[PATCH] Rename variables in gc_relocate related functions to follow LLVM's naming conventions.

[Chen Li]

In http://reviews.llvm.org/D9681#170467, @sanjoy wrote:

> LGTM given that this is a renaming-only change.
>
> Do you want me to check this in for you?


Yes, please! And thanks for doing it!


http://reviews.llvm.org/D9681

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