[Bug cobol/119295] cobol, libcobol uses random_r which is GLIBC specific

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119295

--- Comment #1 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 60775
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60775&action=edit
Patch tested on x86_64 Darwin and Linux

Unfortunately, we don't have a fallback on Darwin other than to use the
original 'random()' and friends.