[D-runtime] More core stuff broken?

[Jonathan M Davis]

When I build Phobos (after a fresh build of dmd and druntime), I'm getting a 
whole pile of errors about undefined references from core.memory and 
core.bitop:

generated/linux/debug/64/unittest/std/algorithm.o: In function 
`_D3std5array17__T8AppenderTAyaZ8Appender7reserveMFmZv':
/home/jmdavis/Programming/github/phobos/std/array.d:2045: undefined reference 
to `_D4core6memory2GC6extendFPvmmZm'
/home/jmdavis/Programming/github/phobos/std/array.d:2055: undefined reference 
to `_D4core6memory2GC6qallocFmkZS4core6memory8BlkInfo_'
generated/linux/debug/64/unittest/std/algorithm.o: In function 
`_D3std5array17__T8AppenderTAyaZ8Appender13ensureAddableMFmZv':
/home/jmdavis/Programming/github/phobos/std/array.d:2102: undefined reference 
to `_D4core6memory2GC6extendFPvmmZm'
/home/jmdavis/Programming/github/phobos/std/array.d:2114: undefined reference 
to `_D4core6memory2GC6qallocFmkZS4core6memory8BlkInfo_'
generated/linux/debug/64/unittest/std/algorithm.o: In function 
`_D3std5array17__T8AppenderTAyaZ8Appender11newCapacityFmZm':
...

So, it looks like whatever has been going on with all of that of late is still 
broken or broken again.

- Jonathan M Davis