Support generic architecture tags, e.g. "x86_64"

[mbirth]

I noticed that e.g. official Synology packages only specify:

arch="x86_64"

instead of listing compatible architectures (e.g. avoton or grantley are both x86_64).

We should add a mapping to accommodate this. SynoCommunity lists a few.

[benrubson]

Here are the available platforms, from the official building tool :

# ./pkgscripts-ng/EnvDeploy -v 6.0 -l
Available platforms: 6281 alpine alpine4k armada370 armada375 armada38x armadaxp avoton braswell bromolow cedarview comcerto2k evansport monaco qoriq x64 broadwell grantley

And the arch families it produces (in INFO files) :

arch="88f6281"
arch="alpine alpine4k"
arch="armada370"
arch="armada375"
arch="armada38x"
arch="armadaxp"
arch="comcerto2k"
arch="evansport"
arch="monaco"
arch="qoriq"
arch="x86 bromolow cedarview avoton braswell broadwell grantley"

[mbirth]

Just for the record: Families for ipq806x, northstarplus (both: armv7), powerpc and all the ppc8... ones (made them ppc) are educated guesses.