monero: unbreak by using bundled rapidjson
monero: unbreak by using bundled rapidjson

The rapidjson 1.1.0 we ship is too old (2016). Monero uses a newer
version as a submodule in git. Using the older system version
resulted in wallets not working, always reporting invalid
password, at least on ppc64le.

Also use correct ARCH on ppc64le.

[ci skip]

necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages