[ARM]: Don't tail-pad over-aligned functions to the alignment boundary.

[ARM]: Don't tail-pad over-aligned functions to the alignment boundary.

2015-04/24  Richard Earnshaw  <rearnsha@arm.com>

	gas/
	* config/tc-arm.h (arm_min): New function.
	(SUB_SEGMENT_ALIGN): Define.

	gas/testsuite/
	* gas/arm/align64.d: Delete trailing padding NOPs.

	ld/testsuite/
	* ld-arm/armthumb-lib.d: Regenerate expected output.
	* ld-arm/armthumb-lib.d: Likewise.
	* ld-arm/armthumb-lib.sym: Likewise.
	* ld-arm/cortex-a8-fix-b-rel-arm.d: Likewise.
	* ld-arm/cortex-a8-fix-b-rel-thumb.d: Likewise.
	* ld-arm/cortex-a8-fix-b.d: Likewise.
	* ld-arm/cortex-a8-fix-bcc-rel-thumb.d: Likewise.
	* ld-arm/cortex-a8-fix-bcc.d: Likewise.
	* ld-arm/cortex-a8-fix-bl-rel-arm.d: Likewise.
	* ld-arm/cortex-a8-fix-bl-rel-plt.d: Likewise.
	* ld-arm/cortex-a8-fix-bl-rel-thumb.d: Likewise.
	* ld-arm/cortex-a8-fix-bl.d: Likewise.
	* ld-arm/cortex-a8-fix-blx-bcond.d: Likewise.
	* ld-arm/cortex-a8-fix-blx-rel-arm.d: Likewise.
	* ld-arm/cortex-a8-fix-blx-rel-thumb.d: Likewise.
	* ld-arm/cortex-a8-fix-blx.d: Likewise.
	* ld-arm/cortex-a8-fix-hdr.d: Likewise.
	* ld-arm/farcall-mixed-app-v5.d: Likewise.
	* ld-arm/farcall-mixed-app.d: Likewise.
	* ld-arm/farcall-mixed-lib-v4t.d: Likewise.
	* ld-arm/farcall-mixed-lib.d: Likewise.
	* ld-arm/mixed-app-v5.d: Likewise.
	* ld-arm/mixed-app.d: Likewise.
	* ld-arm/mixed-lib.d: Likewise.