Move oci and shim to execution package

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

execution/shim/containerd-shim/console_solaris.go

@@ -0,0 +1,14 @@
+// +build solaris
+
+package main
+
+import (
+	"errors"
+	"os"
+)
+
+// NewConsole returns an initalized console that can be used within a container by copying bytes
+// from the master side to the slave that is attached as the tty for the container's init process.
+func newConsole(uid, gid int) (*os.File, string, error) {
+	return nil, "", errors.New("newConsole not implemented on Solaris")
+}