When building a compiler which passes --no-as-needed by default to the linker,
libgcj_bc.so ends up without a DTNEEDED entry for libgcj, because no symbols in
libgcj are required to resolve symbols in libgcj_bc.  This causes about 500 test
cases to fail.  Solved by explicitly passing -Wl,--no-as-needed.  Is this ok for
upstream? It's not needed, but doesn't hurt either.

  Matthias