[patch] Thumb entry points

[Paul Brook]

The attached patch makes the Arm linker set the low bit of the entry point 
address when the symbol is a Thumb function.

Tested with cross to arm-none-eabi
Ok?

Paul

2006-02-04  Paul Brook  <paul@codesourcery.com>

ld/
	* emultempl/armelf.em: Include elf/arm.h.
	(arm_elf_finish): Set low address bit if enty point is a Thumb
	function.
ld/testsuite/
	* ld-arm/arm-elf.exp: Add thumb-entry test.
	* ld-arm/thumb-entry.d: New test.
	* ld-arm/thumb-entry.s: New test.
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