[PATCH] C6X --gc-sections unwinding fix

[Paul Brook]

The attached patch stops --gc-sections incorrectly removing C6X unwinding 
table sections.  It's more or less a copy/paste of the ARM code.

Ok?

Paul

2011-04-07  Paul Brook  <paul@codesourcery.com>

	bfd/
	* elf32-tic6x.c (elf32_tic6x_gc_mark_extra_sections): New function.
	(elf_backend_gc_mark_extra_sections): Define.

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