xtensa: gas: convert tests to run_dump_tests

xtensa: gas: convert tests to run_dump_tests

gas/
2019-04-11  Max Filippov  <jcmvbkbc@gmail.com>

	* testsuite/gas/xtensa/all.exp: Remove all expect-based
	tests and all explicit run_dump_test / run_list_test
	invocations. Add run_dump_tests for all .d files in the
	test subdirectory.
	* testsuite/gas/xtensa/entry_align.d: New test definition.
	* testsuite/gas/xtensa/entry_align.l: New test output.
	* testsuite/gas/xtensa/entry_misalign.d: New test definition.
	* testsuite/gas/xtensa/entry_misalign2.d: New test definition.
	* testsuite/gas/xtensa/j_too_far.d: New test definition.
	* testsuite/gas/xtensa/j_too_far.l: New test output.
	* testsuite/gas/xtensa/loop_align.d: New test definition.
	* testsuite/gas/xtensa/loop_misalign.d: New test definition.
	* testsuite/gas/xtensa/trampoline-2.d: New test definition.
	* testsuite/gas/xtensa/trampoline-2.l: Remove empty output.
	* testsuite/gas/xtensa/xtensa-err.exp: Use positive logic.