Do not allow obsolete syscalls
Do not allow obsolete syscalls

sysfs and ustat syscalls are marked obsolete.

Signed-off-by: Justin Cormack <af64ee19f04db9509cb02b0e470e11e5402ef9b3@unikernel.com>

aditirajagopal/docker,aditirajagopal/docker,aditirajagopal/docker