added razorg_4.3.1-JLS36I into the stock collection

for some time there has been an update for the new  Nexus 7 LTE and i just forgot to upload the images as usual.

changelog: http://web.djodjo.org/article/download/android/changelog/changelog_JSS15J-JLS36I

here it is with deodexed and insecure boot and adb: http://web.djodjo.org/article/download/android/ROM_images/factory_images_gn_razorg