Bug 694148: Remove the NS_USE_NATIVE build variable from coreconf.  r=kaie.
Bug 694148: Remove the NS_USE_NATIVE build variable from coreconf.  r=kaie.

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