reduce-relocations build broken with binutils 2.35

With -reduce-relocations, the shared objects are linked like this:

-shared -Wl,-Bsymbolic-functions -Wl,--dynamic-list,.../QtCore.dynlist

This combination results in global symbols being bound internally, but still exported. It breaks when such a library is used with an executable with copy relocations.
In one case, this happened and was the result of a call to QCoreApplication::instance() getting inlined, accessing the global QCoreApplication::self directly.
This lead to the executable reading from a different copy of the variable than libQt5Core.so wrote to, causing a nullptr deref.

This breaks even with binutils 2.34 if -Wl,-Bsymbolic-functions is omitted.

Downstream bug report: https://bugzilla.opensuse.org/show_bug.cgi?id=1175278
Binutils bug report: https://sourceware.org/bugzilla/show_bug.cgi?id=26407