Add missing #include of prinit.h, which gets automatically included on Windows.
Add missing #include of prinit.h, which gets automatically included on
Windows.

nmav/nss,ekr/nss-old,ekr/nss-old,nmav/nss,ekr/nss-old,nmav/nss,nmav/nss,ekr/nss-old,nmav/nss,nmav/nss,ekr/nss-old,ekr/nss-old,ekr/nss-old,nmav/nss