cilium: check-looging-subsys-field.sh remove trailing '/'
cilium: check-looging-subsys-field.sh remove trailing '/'

Resolve log fields errors. My environment has an issue with the script
check-logging-subsys-fields where excluding ./test dir fails due to
trailing '/'. Remove '/' slashes to resolve the error below.

contrib/scripts/check-logging-subsys-field.sh
 ./test/k8sT/log.go:22:var log = logging.DefaultLogger
 ./test/runtime/log.go:22:var log = logging.DefaultLogger
 ./test/helpers/cilium.go:36:var log = logging.DefaultLogger
 ./test/test_suite_test.go:42:   log             = logging.DefaultLogger
 Logging entry instances have to contain the LogSubsys field. Example of
 properly configured entry instance:

         import (
                "github.com/cilium/cilium/pkg/logging"
                "github.com/cilium/cilium/pkg/logging/logfields"
         )

         var log = logging.DefaultLogger.WithField(logfields.LogSubsys, "my-subsystem")

make: *** [logging-subsys-field] Error 1

Fixes: 629151d4feaa "make: Check LogSubsys field in logging entry instances"
Signed-off-by: John Fastabend <ee461b60978bea1c76b3018c0b89685175b248e2@gmail.com>

scanf/cilium,tgraf/cilium,scanf/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,scanf/cilium,michi-covalent/cilium,cilium/cilium,scanf/cilium,tgraf/cilium,cilium/cilium,tgraf/cilium,michi-covalent/cilium,tklauser/cilium,scanf/cilium,tgraf/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,scanf/cilium,tklauser/cilium,tklauser/cilium,tklauser/cilium,tgraf/cilium,cilium/cilium,tgraf/cilium,cilium-team/cilium,scanf/cilium,cilium-team/cilium