vdso.so binaries present in the upstream source packages are being installed (and executed in the end user non-virtualized environment context, as those seem to be vdso stubs for qemu-user process environment) instead of being built from the source. Removing the **/vdso.so results in failing builds in >=qemu-8.2.0. Upstream doesn't seem to care. Apparently a simple hack from Debian can be used in the ebuild to force the qemu build system to behave: https://gitlab.com/qemu-project/qemu/-/issues/2148#note_1812105636
