[Bug libobjc/48314] Make the new symbols weak symbols

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48314

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-04-01 
19:46:06 UTC ---
Except I think it was a bug that someone would implement them since it was part
of the ABI.