/usr/include/x86_64-linux-gnu/layout/ is in libicu-dev 52.1-8+deb8u7.
This file is owned by root:root, with mode 0o755.
..
/usr/include/x86_64-linux-gnu/layout/LEFontInstance.h
/usr/include/x86_64-linux-gnu/layout/LEGlyphFilter.h
/usr/include/x86_64-linux-gnu/layout/LEGlyphStorage.h
/usr/include/x86_64-linux-gnu/layout/LEInsertionList.h
/usr/include/x86_64-linux-gnu/layout/LELanguages.h
/usr/include/x86_64-linux-gnu/layout/LEScripts.h
/usr/include/x86_64-linux-gnu/layout/LESwaps.h
/usr/include/x86_64-linux-gnu/layout/LETableReference.h
/usr/include/x86_64-linux-gnu/layout/LETypes.h
/usr/include/x86_64-linux-gnu/layout/LayoutEngine.h
/usr/include/x86_64-linux-gnu/layout/ParagraphLayout.h
/usr/include/x86_64-linux-gnu/layout/RunArrays.h
/usr/include/x86_64-linux-gnu/layout/loengine.h
/usr/include/x86_64-linux-gnu/layout/playout.h
/usr/include/x86_64-linux-gnu/layout/plruns.h