sandboxed orientation lock browsing context flag

sandboxed orientation lock browsing context flag

[1] Add allow-orientation-lock to sandbox flags ( (mounirlamouri著, )) <https://github.com/whatwg/html/commit/8f0f73c1b061a8ccee57c6878d8474b43c73aaeb>

[2] Reference orientation lock sandbox flag from HTML spec. ( (mounirlamouri著, )) <https://github.com/w3c/screen-orientation/commit/b504c5db9f88f74bde5ade326bd10380d27106a5>