/usr/share/doc/ is in u-boot-tools 2016.01+dfsg1-2ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/u-boot-tools/
/usr/share/doc/u-boot-tools/changelog.Debian.gz
/usr/share/doc/u-boot-tools/examples/
/usr/share/doc/u-boot-tools/examples/mx6cuboxi.config
/usr/share/doc/u-boot-tools/examples/wandboard.config
/usr/share/doc/u-boot-tools/examples/qnap_ts109-209.config
/usr/share/doc/u-boot-tools/examples/guruplug.config
/usr/share/doc/u-boot-tools/examples/openmoko_gta01.config
/usr/share/doc/u-boot-tools/examples/lsppchg.config
/usr/share/doc/u-boot-tools/examples/sheevaplug.config
/usr/share/doc/u-boot-tools/examples/udoo_quad.config
/usr/share/doc/u-boot-tools/examples/lsmipsel.config
/usr/share/doc/u-boot-tools/examples/openmoko_gta02.config
/usr/share/doc/u-boot-tools/examples/linkstation_pro_live.config
/usr/share/doc/u-boot-tools/examples/efikamx.config
/usr/share/doc/u-boot-tools/examples/kurobox_pro.config
/usr/share/doc/u-boot-tools/examples/qnap_ts119-219.config
/usr/share/doc/u-boot-tools/examples/linkstation-mini.config
/usr/share/doc/u-boot-tools/examples/qnap_ts101.config
/usr/share/doc/u-boot-tools/copyright