Minor fixes.

Minor fixes.

base/loader/ecoff_object.cc:
    Only warn (not die) if we can't load symbols from an ecoff object.
sim/debug.cc:
    Compile in functioning debug_break unless NDEBUG,
    not only if DEBUG.  Print warning if we hit breakpoint
    when compiled with NDEBUG.
sim/debug.hh:
    Compile in functioning debug_break unless NDEBUG,
    not only if DEBUG.

--HG--
extra : convert_revision : baef2caac4a9c88e1389660823eaa7c42b1d19c8