Up the minSdkVersion to 9
Update target to android-10 for NDK code
Add -landroid to LOCAL_LDLIBS and LOCAL_EXPORT_LDLIBS
#define LOGD
Native Asset Manager
isFileExist()
getFileData()

 * The async case is NYI
 * include stdlib for abort() when forAsync is true
Remove references to zip file
Do nothing in the case of forAsync
issue #2276: Add OpenGL lua module
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into glMoudle
Merge branch 'ccx_filesystem' of https://github.com/folecr/cocos2d-x into ccx_filesystem
Merge pull request #2983 from folecr/ccx_filesystem

Improve Android file system read performance
issue #2329:fixed a compiling error of AssetsManager on Android
Merge pull request #2989 from samuele3hu/glMoudle

issue #2276: Add OpenGL lua module
Merge pull request #2990 from minggo/ccx_filesystem

fixed a compiling error of AssetsManager on Android
issue #2325: Fixing an issue that Xcode doesn't rebuild app when source file updated in dependent static library.
Merge pull request #2993 from dumganhar/iss2325-ios-workspace-dependence-fix

issue #2325: Fixing an issue that Xcode doesn't rebuild app when source file updated in dependent static library.