qemu qemu-user-static: Provide binfmt services

[Animeshz]

binfmt-support doesn't work as expected, prioritizes randomly (static & non-static binaries in case both qemu & qemu-user-static is installed), also does not add F flag onto the binfmts which are static (that is required to chroot without copying the binaries to chroot's /usr/bin). Ref: https://github.com/void-linux/void-mklive/issues/253#issuecomment-1146786352.

This adds up runit services so that one can easily create the binfmts specific to qemu using scripts/qemu-binfmt-conf.sh provided in the upstream qemu repository. It also prioritizes static service if symlinked to the service dir.

Testing the changes

• I tested the changes in this PR: briefly

[CameronNemo]

A long while ago I suggested using the binfmt-support software's built in config handling. I still think that is the best option. It lets the user configure the specific binfmt settings and enable/disable formats as necessary.

https://github.com/void-linux/void-packages/pull/10395

[Animeshz]

Seems correct, any idea why was it not merged?

[AviKav]

@CameronNemo As far as I can tell with #10395, whenever a package with binfmt_files would've been updated, the corresponding formats would've been overwritten and reactivated irregardless of a user's changes to the db

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