[Bug sanitizer/59061] Port leaksanitizer

[kcc at gcc dot gnu.org]

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

--- Comment #25 from Kostya Serebryany <kcc at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #24)
> Just tried to bootstrap/regtest that patch, unfortunately it doesn't build
> at all on i686.  Is it meant to work on x86_64 only (or only for
> SANITIZER_WORDSIZE == 64)?

Yes, as of now lsan is supported only on x86_64. 
(heh, this time it is even properly documented. Good!  
https://code.google.com/p/address-sanitizer/wiki/LeakSanitizer)