Latex otf fonts not available system wide

According to the documentation of texlive (see https://www.tug.org/texlive/doc/texlive-en/texlive-en.html#x1-340003.4.4), the installation of xetex should create a file called `texlive-fontconfig.conf`, located in `TEXMFSYSVAR/fonts/conf/texlive-fontconfig.conf`, that can be used to make otf/ttf fonts from Latex available system wide. In Ubuntu packages, this file is not created.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: texlive-xetex 2015.20160320-1
ProcVersionSignature: Ubuntu 4.4.0-38.57-generic 4.4.19
Uname: Linux 4.4.0-38-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: KDE
Date: Sat Sep 24 12:08:07 2016
InstallationDate: Installed on 2016-08-30 (24 days ago)
InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
PackageArchitecture: all
SourcePackage: texlive-base
UpgradeStatus: No upgrade log present (probably fresh install)