building GLIBC with -fsanitize=address

[Yury Gribov]

On 09/27/2014 01:21 AM, Konstantin Serebryany wrote:
> Today, both GCC and Clang asan implementations have flags to emit
> instrumentation via callbacks instead of inline code.
> It makes asan somewhat slower, but allows to continue after the first report.

And there is always opportunity to enable logging in inline 
instrumentation as well if outline instrumentation proves to be too slow.

-Y