Update for spine runtime

Conflicts:
	extensions/proj.win32/libExtensions.vcxproj
	extensions/proj.win32/libExtensions.vcxproj.filters
Update spine runtime
Update Android.mk
Update Makefile

For nacl (spine runtime)
Update Android.mk
Update for spine runtime.
fixed #2252: Updating iOS and mac project configuration.
fixed #2252: Fixing a bug that stdio.h is in c++ namespace.
Updating AUTHORS.
Merge pull request #2746 from dumganhar/update-spine-runtime-master

fixed #2252: Updating spine-runtime to the latest version. [master]