tree-wide: sort includes

Sort the includes accoding to the new coding style.

src/basic/label.c

@@ -19,10 +19,10 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include "label.h"
 #include "selinux-util.h"
 #include "smack-util.h"
 #include "util.h"
-#include "label.h"
 
 int label_fix(const char *path, bool ignore_enoent, bool ignore_erofs) {
         int r, q;