When r241373 was merged, one file appears to have been missed from the
commit. Merge it:
Remove undefined behavior from sranddev() and srandomdev(). This doesn't actually work with any modern C compiler: In particular, both clang and modern gcc verisons silently elide any xor operation with 'junk'.
No mergeinfo changes with this commit as r241475 already updated the
mergeinfo.
Approved by: re (jpaetzel)