- fix building with ports again:
* ifuncs tracing backport requires adjustments
- avoid using asynchronous-unwind-tables only during configure,
but still built the library with unwind tables enabled
- replace arm build hack with a proper solution
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- armv8l architecture does not exist
OBS-URL: https://build.opensuse.org/request/show/90934
OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=128
