ld/testsuite/ld-arm: Fix ifunc-17 failure with arm-eabi.

ld/testsuite/ChangeLog:

2013-04-30  Will Newton  <will.newton@linaro.org>

	* ld-arm/arm-elf.exp: Use linker script for IFUNC test 17.
	* ld-arm/ifunc-17.dd: Update offsets for linker script.
	* ld-arm/ifunc-17.gd: Likewise.
	* ld-arm/ifunc-17.rd: Likewise.