[6/6][PATCH] Respect symbol wrappers when computing symbol resolutions.

[Dave Korn <dave dot korn dot cygwin at gmail dot com>]

    Hi list,

  I found this running the GCC testsuite, where on cygwin we use ld wrappers
to allow replacement of libstdc++ new/delete operators.

ld/ChangeLog:

2011-02-24  Dave Korn  <...

	* plugin.c (get_symbols): Use wrapped lookup for undefined symbols.

  I'd like it if someone can confirm that I've correctly interpreted the
comment that precedes the definition of bfd_wrapped_link_hash_lookup, about
how it should "only be used for references to an undefined symbol, not for
definitions of a symbol"; I took that to mean that I should key off the
initial state of defined-ness of the symbol passed from the plugin and call
either a wrapped or unwrapped lookup accordingly, but possibly since we're
asking about the resolution of a symbol, it would make as much sense to always
treat this as if we were looking up an undefined reference and simply always
call the wrapped lookup?

    cheers,
      DaveK