[RFA] Don't warn when using ld --wrap and code in Thumb-state on ARM

[Alan Modra]

Hi Ian, I don't suppose you have a testcase for "setting up an
indirection from a symbol to itself" in
http://sourceware.org/ml/binutils/1999-q3/msg00068.html

I'm wondering if we still need the early exit from
_bfd_elf_merge_symbol.

-- 
Alan Modra
Australia Development Lab, IBM