SELinux: rename selinux_netlabel.h to netlabel.h

In the beginning I named the file selinux_netlabel.h to avoid potential
namespace colisions.  However, over time I have realized that there are several
other similar cases of multiple header files with the same name so I'm changing
the name to something which better fits with existing naming conventions.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index d41e24d..7f8d0b1 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -77,7 +77,7 @@
 #include "objsec.h"
 #include "netif.h"
 #include "xfrm.h"
-#include "selinux_netlabel.h"
+#include "netlabel.h"
 
 #define XATTR_SELINUX_SUFFIX "selinux"
 #define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX