grsecurity module: assert RBAC support in kernel

+1
+1
nixos/modules/security/grsecurity.nix
··· 50 50 (isEnabled "PAX") 51 51 (isYES "GRKERNSEC_SYSCTL") 52 52 (isYES "GRKERNSEC_SYSCTL_DISTRO") 53 + (isNO "GRKERNSEC_NO_RBAC") 53 54 ]; 54 55 55 56 # Install PaX related utillities into the system profile.