readme: add nokmem build tag
@@ -68,6 +68,7 @@ make BUILDTAGS='seccomp apparmor'
| selinux | selinux process and mount labeling | <none> |
| apparmor | apparmor profile support | <none> |
| ambient | ambient capability support | kernel 4.3 |
+| nokmem | disable kernel memory account | <none> |
### Running the test suite
