/usr/ is in golang-github-pierrec-xxhash-dev 0.0~git20150916.0.122b94d-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/gocode/
/usr/share/gocode/src/
/usr/share/gocode/src/github.com/
/usr/share/gocode/src/github.com/pierrec/
/usr/share/gocode/src/github.com/pierrec/xxHash/
/usr/share/gocode/src/github.com/pierrec/xxHash/xxHash32/
/usr/share/gocode/src/github.com/pierrec/xxHash/xxHash32/example_test.go
/usr/share/gocode/src/github.com/pierrec/xxHash/xxHash32/xxHash32.go
/usr/share/gocode/src/github.com/pierrec/xxHash/xxHash32/xxHash32_test.go
/usr/share/gocode/src/github.com/pierrec/xxHash/xxHash64/
/usr/share/gocode/src/github.com/pierrec/xxHash/xxHash64/example_test.go
/usr/share/gocode/src/github.com/pierrec/xxHash/xxHash64/xxHash64.go
/usr/share/gocode/src/github.com/pierrec/xxHash/xxHash64/xxHash64_test.go
/usr/share/gocode/src/github.com/pierrec/xxHash/xxhsum/
/usr/share/gocode/src/github.com/pierrec/xxHash/xxhsum/main.go
/usr/share/doc/
/usr/share/doc/golang-github-pierrec-xxhash-dev/
/usr/share/doc/golang-github-pierrec-xxhash-dev/copyright
/usr/share/doc/golang-github-pierrec-xxhash-dev/changelog.Debian.gz