gas/elf dwarf2 tests

gas/elf dwarf2 tests

Make them work for tile, by using ".quad 0" as the simulated
instruction and doubling size of aligns.  The larger aligns tripped
over riscv alignment handling, fixed by adding -mno-relax there.
Also disable link-relax for avr, pru and xtensa, allowing these
targets to pass these tests.  With link-time relaxation enabled,
these targets emit alignment relocations rather than aligning at
assembly time.  This means the assembler doesn't see a change in PC
when it is expected over an alignment frag and thus view numbers are
calculated incorrectly.

	* testsuite/gas/elf/dwarf2-1.s,
	* testsuite/gas/elf/dwarf2-2.s,
	* testsuite/gas/elf/dwarf2-5.s,
	* testsuite/gas/elf/dwarf2-7.s,
	* testsuite/gas/elf/dwarf2-8.s,
	* testsuite/gas/elf/dwarf2-9.s,
	* testsuite/gas/elf/dwarf2-10.s,
	* testsuite/gas/elf/dwarf2-11.s,
	* testsuite/gas/elf/dwarf2-12.s,
	* testsuite/gas/elf/dwarf2-13.s,
	* testsuite/gas/elf/dwarf2-14.s,
	* testsuite/gas/elf/dwarf2-15.s,
	* testsuite/gas/elf/dwarf2-16.s,
	* testsuite/gas/elf/dwarf2-17.s,
	* testsuite/gas/elf/dwarf2-18.s,
	* testsuite/gas/elf/dwarf2-19.s: Double size of align and simulated
	instructions.
	* testsuite/gas/elf/dwarf2-1.d,
	* testsuite/gas/elf/dwarf2-2.d,
	* testsuite/gas/elf/dwarf2-5.d,
	* testsuite/gas/elf/dwarf2-7.d,
	* testsuite/gas/elf/dwarf2-8.d,
	* testsuite/gas/elf/dwarf2-9.d,
	* testsuite/gas/elf/dwarf2-10.d,
	* testsuite/gas/elf/dwarf2-11.d,
	* testsuite/gas/elf/dwarf2-12.d,
	* testsuite/gas/elf/dwarf2-13.d,
	* testsuite/gas/elf/dwarf2-14.d,
	* testsuite/gas/elf/dwarf2-15.d,
	* testsuite/gas/elf/dwarf2-16.d,
	* testsuite/gas/elf/dwarf2-17.d,
	* testsuite/gas/elf/dwarf2-18.d,
	* testsuite/gas/elf/dwarf2-19.d: Use xfail rather than notarget.
	Remove avr, pru, tile, xtensa from xfails.  Update expected output.
	* testsuite/gas/elf/elf.exp: Sort targets.
	(dump_opts): Pass {as -mno-relax} for riscv, {as -mno-link-relax}
	for avr and pru, and {as --no-link-relax} for xtensa to dwarf tests.
	* testsuite/gas/elf/section2.e-miwmmxt: Delete unused file.