chore(maker-rpm): map arm64 -> aarch64

[dsanders11]

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Summarize your changes:

The canonical name used by the rpm package is aarch64. The current behavior of leaving the name arm64 unmapped can lead to subtle behavior differences, since during the RPM building process, the platform name is used for matching against macros under /usr/lib/rpm/platform/<platform>/macros, and the platform name there is aarch64-linux. Mapping to aarch64 also ensures that the behavior of --arch=arm64 is the same as running on a Linux Arm64 machine, where uname will be returning aarch64, not arm64.

Note that this does change the extension of the final RPM to *.aarch64.rpm instead of *.arm64.rpm.

[malept]

Eventually all of this logic should be upstreamed, but for now this looks fine.

[malept]

There is one thing I'm worried about - changing the default filename seems like a breaking change since that would cause a lot of churn for projects using Forge and generating RPMs. I would suggest avoiding this change and making the break when we decide to release v7.

[dsanders11]

Good point @malept, will certainly result in some issues if the name changes. Maybe for now I can update this PR to provide a rename function for electron-install-redhat (ref packages/maker/rpm/src/MakerRpm.ts#L46) to avoid the name change on the resulting RPM.

[dsanders11]

@malept, I've updated this PR to use the rename option to keep the name of the RPM the same, ending with .arm64.rpm. The architecture of the RPM if you inspect it (rpm -qip foo.arm64.rpm) says aarch64 now instead of arm64, but I don't think that's enough of a concern to force this to be a breaking change.