[llvm] r181785 - Declare __clear_cache.

[Rafael Espíndola]

>>  extern "C" void sys_icache_invalidate(const void *Addr, size_t len);
>> +extern "C" void __clear_cache(char *, char*);
>
> With gcc 4.7:
>
> lib/Support/Unix/Memory.inc:36:44: error: new declaration 'void
> __clear_cache(char*, char*)' [-Werror]
> lib/Support/Unix/Memory.inc:36:44: error: ambiguates built-in
> declaration 'void __clear_cache(void*, void*)' [-Werror]

Really sorry about the confusion. I realized I was testing this
without the 'extern "C"', so gcc would warn precisely when the type
was correct!

Should be fixed by 181811 and 181810.

Cheers,
Rafael