[Bug sanitizer/59061] Port leaksanitizer

[kcc at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59061

--- Comment #3 from Kostya Serebryany <kcc at gcc dot gnu.org> ---
https://code.google.com/p/address-sanitizer/wiki/LeakSanitizer

I agree, we need to update the gcc doc to mention the URL above.