libsupc++ compiler warning on eh_personality.cc

[Benjamin Kosnik]

Not a biggie, but kind of annoying

ections -g -c /mnt/hd/bliss/src.gcc/libstdc++-v3/libsupc++/eh_personality.cc  -fPIC -DPIC -o eh_personality.o
/mnt/hd/bliss/src.gcc/libstdc++-v3/libsupc++/eh_personality.cc: In function 
   `void __cxa_call_unexpected(_Unwind_Exception*)':
/mnt/hd/bliss/src.gcc/libstdc++-v3/libsupc++/eh_personality.cc:403: warning: new   declaration `void __cxa_call_unexpected(_Unwind_Exception*)'
/mnt/hd/bliss/src.gcc/libstdc++-v3/libsupc++/eh_personality.cc:403: warning: ambiguates
   built-in declaration `void __cxa_call_unexpected(void*)'
/bin/sh ../libtool --tag CXX --tag disable-shared                --mode=compile