gas: run the hwcaps-bump tests with 64-bit sparc objects only.

gas/ChangeLog:

2016-11-23  Jose E. Marchesi  <jose.marchesi@oracle.com>

	* testsuite/gas/sparc/sparc.exp (gas_64_check): Make sure the
	hwcaps-bump test is run with 64-bit objects.
2 files changed