x86 and OSF: Don't forget to set NUMA node nodeset

x86: Not critical since BSDs that use this backend have no membind support,
but better fix it for uniformization.
(cherry picked from commit a431361c7d2a3772ea7a2ffee922b3cf61e858cd)

OSF: Looks like nobody ever tried to play with memory binding on OSF/Tru64.
(cherry picked from commit 2d6c73356d8d2dd7a22b99b3d51fbecb002e77b9)