[release-branch.go1.16] syscall: fix TestGroupCleanupUserNamespace test failure on Fedora

For #46752
Fixes #46769

Change-Id: I2eaa9d15fac4e859e18191fcf1372e5be94899df
GitHub-Last-Rev: 8a2672d
GitHub-Pull-Request: #46753
Reviewed-on: https://go-review.googlesource.com/c/go/+/328109
Run-TryBot: Tobias Klauser <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-by: Tobias Klauser <[email protected]>
(cherry picked from commit a752bc0)
Reviewed-on: https://go-review.googlesource.com/c/go/+/329831
Trust: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>

Author: rabajaj0509

src/syscall/exec_linux_test.go

@@ -317,6 +317,7 @@ func TestGroupCleanupUserNamespace(t *testing.T) {
 		"uid=0(root) gid=0(root) groups=0(root),65534",
 		"uid=0(root) gid=0(root) groups=0(root),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody),65534(nobody)", // Alpine; see https://golang.org/issue/19938
 		"uid=0(root) gid=0(root) groups=0(root) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023",                                                                               // CentOS with SELinux context, see https://golang.org/issue/34547
+		"uid=0(root) gid=0(root) groups=0(root),65534(nobody) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023",                                                                 // Fedora with SElinux context, see https://golang.org/issue/46752
 	}
 	for _, e := range expected {
 		if strOut == e {