[Bug libobjc/61332] libobjc unsafe malloc use instead objc_malloc

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61332

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The difference between malloc and objc_malloc is minor when not using GC.  In
fact the program will crash is malloc returns NULL anyways.