[patch] Handle calls in GlobalStatus

[Rafael Espíndola]

Forgot to mention. This finally fixes pr11866.

The final clang binary goes from 43616296 to 43124224 bytes. The text
section goes from 39135765 to 38754830.

On 22 October 2013 00:29, Rafael Espíndola <rafael.espindola at gmail.com> wrote:
> This patch teaches GlobalStatus to analyze a call that uses the global
> value as a callee, not
> as an argument.
>
> With this change internalize call handle the common use of
> linkonce_odr functions. This reduces the number of linkonce_odr
> functions in a LTO build of clang (checked with the emit-llvm gold
> plugin option) from 1730 to 60.
>
> Cheers,
> Rafael