emulators/dolphin-emu: set LLD_UNSAFE

Prevent Dolphin from linking using lld as it fails with errors like:

/usr/bin/ld: error: cannot preempt symbol: alcOpenDevice

defined in /usr/local/lib/libopenal.so
referenced by OpenALStream.cpp

OpenALStream.cpp.o:(OpenALStream::Start())

due to preemption of symbols with protected visibility in a shared object.

See also PR #219089 for more details.

PR: 226980
Submitted by: emaste