gnu: linux-libre: Add linux-libre 5.17.

gnu: linux-libre: Add linux-libre 5.17.

* gnu/packages/linux.scm (linux-libre-5.17-version,
linux-libre-5.17-gnu-revision, deblob-scripts-5.17,
linux-libre-5.17-pristine-source, linux-libre-5.17-source,
linux-libre-headers-5.17, linux-libre-5.17): New variables.
* gnu/packages/aux-files/linux-libre/5.17-arm.conf,
gnu/packages/aux-files/linux-libre/5.17-arm64.conf,
gnu/packages/aux-files/linux-libre/5.17-i686.conf,
gnu/packages/aux-files/linux-libre/5.17-x86_64.conf: New files.
* Makefile.am (AUX_FILES): Add them.