games-util/hydra-launcher-bin: new package, add 3.8.1

[Gur0v]

A game launcher that allows you to download, play, track your stats and manage your games all in one place.

Upstream: https://github.com/hydralauncher/hydra

[stkw0]

Thank you for your interest in contributing to GURU. I left some comments to improve the ebuild.

Also, to add new package, please, follow the instructions from https://wiki.gentoo.org/wiki/Project:GURU/Information_for_Contributors and ensure that the maintainer email in the metadata.xml match the email you used to register on Bugzilla. We generally don't merge PR for new packages.

[Gur0v]

Fixed chrome-sandbox permissions to match other Electron apps (using 4711 + explicit fowners root). Added RESTRICT=mirror. Switched to unpacker eclass with rpmunpack instead of manual rpm2tar conversion.

[Gur0v]

Inherited rpm eclass for automatic RPM extraction. Added -* to KEYWORDS and wrapped SRC_URI with amd64?. Switched to find. Added net-misc/aria2 dependency to use system package instead of bundled version.

[stkw0]

From pkgcheck scan:

games-util/hydra-launcher-bin
  DeprecatedDep: version 3.8.1: RDEPEND: deprecated dependency: sys-libs/zlib
  VariableOrderWrong: version 3.8.1: variable S should occur before RESTRICT
  WhitespaceFound: version 3.8.1: ebuild has trailing whitespace on lines: 48, 52, 55, 58

(you should depend on virtual/zlib instead)

And some other QA warnings:

 * QA Notice: Unresolved soname dependencies:
 *
 * 	/opt/Hydra/resources/app.asar.unpacked/node_modules/classic-level/prebuilds/android-arm/classic-level.armv7.node: libc++_shared.so libc.so libdl.so liblog.so libm.so
 * 	/opt/Hydra/resources/app.asar.unpacked/node_modules/classic-level/prebuilds/android-arm64/classic-level.armv8.node: libc++_shared.so libc.so libdl.so liblog.so libm.so
 * 	/opt/Hydra/resources/app.asar.unpacked/node_modules/classic-level/prebuilds/linux-arm/classic-level.armv6.node: libc.so.6 libgcc_s.so.1 libm.so.6 libstdc++.so.6
 * 	/opt/Hydra/resources/app.asar.unpacked/node_modules/classic-level/prebuilds/linux-arm/classic-level.armv7.node: libc.so.6 libgcc_s.so.1 libm.so.6 libstdc++.so.6
 * 	/opt/Hydra/resources/app.asar.unpacked/node_modules/classic-level/prebuilds/linux-arm64/classic-level.armv8.node: libc.so.6 libgcc_s.so.1 libm.so.6 libpthread.so.0 libstdc++.so.6
 * 	/opt/Hydra/resources/app.asar.unpacked/node_modules/classic-level/prebuilds/linux-x64/classic-level.musl.node: libc.musl-x86_64.so.1
 *

Because the ebuild only supports amd64 you could just remove the binary libraries for unsupported architectures.

Also, remember to use the standard commit format