fix for egcs for freebsd-elf

[Jeffrey A Law]

  In message < Pine.SOL.4.05.9905072044090.5024-200000@luna >you write:
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  > egcs for for freebsd does not currently handle the -pthread flag correctly
  > i.e. link against libc_r instead of libc. I have attached fix for that.
Do not send whole files.  Send diffs.

http://egcs.cygnus.com/contribute.html

jeff