PATCH: PR ld/9679: Linker doesn't merge visibility of weak symbol

[H.J. Lu]

Hi,

When we skip a weak definition, we failed to merge its visibility. This
patch fixes it.

-- 
H.J.
---

2008-12-22  H.J. Lu  <hongjiu.lu@intel.com>

	PR ld/9679
	* elflink.c (elf_merge_st_other): New.
	(_bfd_elf_merge_symbol): Use it on skipped weak definitions and
	hide them if needed.
	(elf_link_add_object_symbols): Updated.
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