New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/26962#issuecomment-751390575

Comment:
From IRC, about the issue with stubs-soft:

```
16:47 <q66> [q66@/home/q66/.xbps-src/masterdir-ppc64le /]$ clang -target armv7l-linux-gnueabihf -dM -E - < /dev/null|grep ARM_PCS_VFP
16:47 <q66> #define __ARM_PCS_VFP 1
16:47 <q66> bu that should also work by default
16:47 <q66> ohhhh
16:47 <q66> that gives me an idea
16:47 <q66> it's probably running clang, but for host
16:48 <ericonr> oh that would definitely explain it
16:48 <q66> i.e. target triplet is not passed to clang and as a result it does not have arm macros and fails to use the headers properly
```

Regarding armv6l, imo we can just use

```
if [ "$XBPS_TARGET_NO_ATOMIC8" ]; then
	broken="Requires 8-byte atomics"
fi
```

in the template, and then add the packages that will have to be removed to #23575