Update cocos2d_specifics.cpp

fix bug about scheduler, if this value is -1, it will work all right in Emulator, but run error in real device, just call one time.
issue #2768:Add Armature lua binding and releated test samples
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into Armature

Conflicts:
	extensions/cocos-ext.h
issue #2768:Add a newline
issue #2768:Modify testlua and hellolua sample's linux mayflies.
issue #2771:  add tag and enable functions to physics classes
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into iss2771_physical
issue #2771:  refactor PhysicsTest
issue #2771:  move _physicsBody from sprite to node
issue #2771:  separate the PhysicsBody and the PhysicsShape.
issue #2771:  fix some bugs in PhysicsShape
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into Armature
issue #2768:Modify armature test sample and skip some functions to lua
issue #2771:  let PhysicsShape::create doesn't need to pass the PhysicsBody
issue #2771:  add PhysicsMaterial
issues #2899:Fix application will crash when back to background on Android.
issues #2914:removeSpriteFramesFromFile() crashes if file doesn't exist
issue #2768:Modify the linux make files of the liblua 、the testlua and hellolua projects
Fix miss project configuration for CoreMotion.
Merge pull request #3905 from Dhilan007/di2914

issues #2914:removeSpriteFramesFromFile() crashes if file doesn't exist