roken: Rename gettimeofday replacement
roken: Rename gettimeofday replacement

All replacement roken functions are named rk_blah to avoid symbol
collisions. gettimeofday wasn't being renamed in the header, so fix
that.

This doesn't change the soname of the resulting library, as gettimeofday
isn't currently exported.

madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal,madscientist159/heimdal