MFH: r458224

games/aquaria: unbreak with LLD by default

Linking with LLD currently fails due to preemption of symbols with
protected visibility in a shared object:

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

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

CMakeFiles/aquaria.dir/BBGE/FmodOpenALBridge.cpp.o:(OggDecoder::decode_loop(OggDecoder*))

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

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

CMakeFiles/aquaria.dir/BBGE/FmodOpenALBridge.cpp.o:(OggDecoder::decode_loop(OggDecoder*))

[...]

For now set LLD_UNSAFE=yes so that the port will continue to link with
ld.bfd if /usr/bin/ld is lld, until the issue can be addressed (with a
change in openal-soft or in lld).

Reported by: antoine (via bug 214864)
Approved by: ports-secteam blanket