[master] BB only supports .ogg and .wav sound format. So add comment in CocosDenshionTest.lua to prompt developer to change sound format for Blackberry.
Merge pull request #3831 from dumganhar/bb-lua-sound-add-comment

[master] BB only supports .ogg and .wav sound format. So add comment in CocosDenshionTest.lua to prompt developer to change sound format for Blackberry.[ci skip]