updated angle to commit 4a980d2612
Merge pull request #56 from MSOpenTech/v3-angle-update

updated angle to commit 4a980d2612
Add flat buffers into external
Rebuild luajit base on ndk r10c
Merge pull request #59 from Dhilan007/v3-luajit

Fix link error when build cocos2d-x base one ndk r10c
Merge pull request #58 from pipu/v3_add_flatbuffers

Add flat buffers into external