Squashed 'thirdparty/tinyxml2/' content from commit f0e8fac

git-subtree-dir: thirdparty/tinyxml2
git-subtree-split: f0e8fac4ee9b6e49b5339037a45d1d12e2f7155e
Merge commit '9190919a5c777a7a088faece58fa9b46fb9b9bf2' as 'thirdparty/tinyxml2'