[patch] Avoid building compiler-rt with LTO

[Rafael Espíndola]

On 29 December 2014 at 20:42, Alexey Samsonov <samsonov at google.com> wrote:
> How do you build with LTO? Do you just pass "-flto" in CMAKE_C_FLAGS /
> CMAKE_CXX_FLAGS, or there's a special CMake variable for that?

Just pass -flto.

>In the former
> case, this patch is OK (although, it's better to check for flag existence by
> introducing COMPILER_RT_HAS_FNO_LTO_FLAG).

A added the flag as committed as r225049.

Cheers,
Rafael