Bump github.com/opencontainers/selinux from 1.7.0 to 1.8.0

Bumps [github.com/opencontainers/selinux](https://github.com/opencontainers/selinux) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/opencontainers/selinux/releases)
- [Commits](https://github.com/opencontainers/selinux/compare/v1.7.0...v1.8.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/opencontainers/selinux/go-selinux/doc.go

@@ -5,9 +5,6 @@ This package uses a selinux build tag to enable the selinux functionality. This
 allows non-linux and linux users who do not have selinux support to still use
 tools that rely on this library.
 
-To compile with full selinux support use the -tags=selinux option in your build
-and test commands.
-
 Usage:
 
 	import "github.com/opencontainers/selinux/go-selinux"

vendor/github.com/opencontainers/selinux/go-selinux/label/label_linux.go

@@ -1,5 +1,3 @@
-// +build selinux,linux
-
 package label
 
 import (

vendor/github.com/opencontainers/selinux/go-selinux/label/label_stub.go

@@ -1,4 +1,4 @@
-// +build !selinux !linux
+// +build !linux
 
 package label
 

vendor/github.com/opencontainers/selinux/go-selinux/selinux_linux.go

@@ -1,5 +1,3 @@
-// +build selinux,linux
-
 package selinux
 
 import (

vendor/github.com/opencontainers/selinux/go-selinux/selinux_stub.go

@@ -1,4 +1,4 @@
-// +build !selinux !linux
+// +build !linux
 
 package selinux
 

vendor/github.com/opencontainers/selinux/go-selinux/xattrs_linux.go

@@ -1,5 +1,3 @@
-// +build selinux,linux
-
 package selinux
 
 import (