upgrade libcurl for iOS
upgrade libcurl mac project settings
remove libcurl.dylib
add prebuilt libcurl to linux
update config.json
revert linux cmake modification
Merge branch 'v3' into update-curl

Conflicts:
	build/cocos2d_tests.xcodeproj/project.pbxproj
fix conflicts
Merge pull request #9733 from andyque/update-curl

Update curl