add interface for keep Matrix
Merge pull request #5526 from samuele3hu/develop_new_fix

fix: Update the RELEASE_NOTES.md
calculate viewport based on _fullRect _rtRect and _fullRectViewport
fix matrix push/pop bug
[Jenkins] fix the url of repos
Merge pull request #5529 from lmskater/fix-repos-url

[Jenkins] fix the url of repos
change environment variable name from NDK_ROOT1 to NDK_ROOT
Merge pull request #5530 from minggo/install

change environment variable name from NDK_ROOT1 to NDK_ROOT
[Jenkins] remove unused code
Merge pull request #5531 from lmskater/remove-unuse-code

[Jenkins] remove unused code
issue #4234: 'Event* event' needs to be in 'TouchScriptData' struct.
issue #4234: Acceleration -> const Acceleration&
issue #4234: Fixes linking error in UI.
Merge pull request #5532 from dumganhar/iss4234-bind-event-dispatcher

issue #4234: Some fixes when binding event dispatcher.
Update the reference of submodule "plugin".
implement interface setKeepMatrix, setVirtualViewPort
add new test cases
set scaleY to -1 for test case, because renderTexture result is not the same as texture load from file
remove blank line，adjust indent
Merge pull request #5533 from natural-law/develop

Update the reference of submodule "plugin".