/usr/share/go-1.6/src/internal/syscall/ is in golang-1.6-src 1.6.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/go-1.6/src/internal/syscall/unix/
/usr/share/go-1.6/src/internal/syscall/unix/getrandom_linux.go
/usr/share/go-1.6/src/internal/syscall/unix/getrandom_linux_386.go
/usr/share/go-1.6/src/internal/syscall/unix/getrandom_linux_amd64.go
/usr/share/go-1.6/src/internal/syscall/unix/getrandom_linux_arm.go
/usr/share/go-1.6/src/internal/syscall/unix/getrandom_linux_generic.go
/usr/share/go-1.6/src/internal/syscall/unix/getrandom_linux_mips64x.go
/usr/share/go-1.6/src/internal/syscall/unix/getrandom_linux_ppc64x.go
/usr/share/go-1.6/src/internal/syscall/unix/getrandom_linux_s390x.go
/usr/share/go-1.6/src/internal/syscall/windows/
/usr/share/go-1.6/src/internal/syscall/windows/registry/
/usr/share/go-1.6/src/internal/syscall/windows/registry/export_test.go
/usr/share/go-1.6/src/internal/syscall/windows/registry/key.go
/usr/share/go-1.6/src/internal/syscall/windows/registry/registry_test.go
/usr/share/go-1.6/src/internal/syscall/windows/registry/syscall.go
/usr/share/go-1.6/src/internal/syscall/windows/registry/value.go
/usr/share/go-1.6/src/internal/syscall/windows/registry/zsyscall_windows.go
/usr/share/go-1.6/src/internal/syscall/windows/syscall_windows.go
/usr/share/go-1.6/src/internal/syscall/windows/sysdll/
/usr/share/go-1.6/src/internal/syscall/windows/sysdll/sysdll.go
/usr/share/go-1.6/src/internal/syscall/windows/zsyscall_windows.go