update selinux to 1.6.0 release

Signed-off-by: Michael Crosby <michael@thepasture.io>

vendor/github.com/willf/bitset/trailing_zeros_19.go

@@ -0,0 +1,9 @@
+// +build go1.9
+
+package bitset
+
+import "math/bits"
+
+func trailingZeroes64(v uint64) uint {
+	return uint(bits.TrailingZeros64(v))
+}