Fixes go lint in signal_posix.go
Fixes go lint in signal_posix.go

Signed-off-by: Chris Mark <89d5d375ccea8a9e23676d7ee1dfafd76761b134@gmail.com>
AmitKumarDas/maya,openebs/maya,prateekpandey14/maya,openebs/maya,openebs/maya,prateekpandey14/maya,AmitKumarDas/maya