2017-07-23  Michael Collison  <michael.collison@arm.com>

	* config/arm/arm.c (arm_option_override): Deprecate
	use of -mstructure-size-boundary.
	* config/arm/arm.opt: Deprecate -mstructure-size-boundary.
	* doc/invoke.texi: Deprecate -mstructure-size-boundary.

From-SVN: r250465