update changelog
closed #3867: "Testing empty labels" in LabelTest crashes on Linux platform.
Merge pull request #5249 from minggo/develop

[ci skip]update changelog
Merge pull request #5250 from dumganhar/iss3867-linux-empty-string-crash

closed #3867: "Testing empty labels" in LabelTest crashes on Linux platform.
Update CHANGELOG [ci skip]
Updates JS-Test: fix ArmatureTest/ChangeMounttest fails.
Merge pull request #5251 from dumganhar/develop

Updates JS-Test: fix ArmatureTest/ChangeMounttest fails.
issue #3401: add bit operation for lua physics test
issue #3401: bug fix
close #3869:fixed Font::setCurrentGlyphCollection not saved the settings
Merge pull request #5254 from Dhilan007/develop_label

close #3869:fixed Font::setCurrentGlyphCollection not saved the settings
issue #3401: bug fix
Merge pull request #5253 from boyu0/iss3401_lua_bit_fix

issue #3401: add bit operation for lua physics test
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop