Vendor in logrus v1.4.2

Fixes #3346

Signed-off-by: Jhon Honce <jhonce@redhat.com>

vendor/github.com/sirupsen/logrus/terminal_check_unix.go

@@ -0,0 +1,13 @@
+// +build linux aix
+
+package logrus
+
+import "golang.org/x/sys/unix"
+
+const ioctlReadTermios = unix.TCGETS
+
+func isTerminal(fd int) bool {
+	_, err := unix.IoctlGetTermios(fd, ioctlReadTermios)
+	return err == nil
+}
+