Move libcontainer into subdirectory

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

libcontainer/rootfs_linux_test.go

@@ -0,0 +1,37 @@
+// +build linux
+
+package libcontainer
+
+import "testing"
+
+func TestCheckMountDestOnProc(t *testing.T) {
+	dest := "/rootfs/proc/"
+	err := checkMountDestination("/rootfs", dest)
+	if err == nil {
+		t.Fatal("destination inside proc should return an error")
+	}
+}
+
+func TestCheckMountDestInSys(t *testing.T) {
+	dest := "/rootfs//sys/fs/cgroup"
+	err := checkMountDestination("/rootfs", dest)
+	if err != nil {
+		t.Fatal("destination inside /sys should not return an error")
+	}
+}
+
+func TestCheckMountDestFalsePositive(t *testing.T) {
+	dest := "/rootfs/sysfiles/fs/cgroup"
+	err := checkMountDestination("/rootfs", dest)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestCheckMountRoot(t *testing.T) {
+	dest := "/rootfs"
+	err := checkMountDestination("/rootfs", dest)
+	if err == nil {
+		t.Fatal(err)
+	}
+}