ARM calls to udefined functions

[Paul Brook]

The ARM EABI specifies that R_ARM_CALL and R_ARM_THM_CALL against a weak 
undefined symbol result in a jump to the next instruction.

Other jump relocations are undefined, so we do the same for the ones that 
happen to be in the same case statement.

Tested on arm-none-eabi.
Applied to CVS head.

Paul

2007-06-29  Paul Brook  <paul@codesourcery.com>

	bfd/
	* elf32-arm.c (bfd_elf32_arm_process_before_allocation): Suppress
	call veneers for call relocations against undefined symbols.
	(elf32_arm_final_link_relocate): Turn call to undefined symbol
	into a jump to the next instruction.

	ld/testuite/
	* ld-arm/arm-elf.exp (armelftests): Add callweak.
	* ld-arm/callweak.d: New test.
	* ld-arm/callweak.s: New test.


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