gnu: linux-libre: Update to 4.16.1.
* gnu/packages/linux.scm (%linux-libre-version): Update to 4.16.1.
(%linux-libre-hash): Update hash.
* gnu/packages/aux-files/linux-libre/4.15-arm.conf,
gnu/packages/aux-files/linux-libre/4.15-i686.conf,
gnu/packages/aux-files/linux-libre/4.15-x86_64.conf: Delete files.
* gnu/packages/aux-files/linux-libre/4.16-arm.conf,
gnu/packages/aux-files/linux-libre/4.16-i686.conf,
gnu/packages/aux-files/linux-libre/4.16-x86_64.conf: New files.
* Makefile.am (AUX_FILES): Update accordingly.