A few hppa testcase tidies

A few hppa testcase tidies

binutils/
	* testsuite/lib/binutils-common.exp (is_som_format): New proc.
	(run_dump_test): Correct target test for alternate .comm syntax.
	(get_standard_section_names): Handle som format.
	* testsuite/lib/utils-lib.exp (default_binutils_assemble_flags):
	Correct target test for alternate .comm syntax.
gas/
	* testsuite/gas/all/gas.exp (redef3): Don't xfail for hppa.
	(octa): Run for hppa.
	* testsuite/gas/elf/elf.exp (common1, common2): Likewise.
	* testsuite/gas/elf/symver.d: Delete notarget.
ld/
	* testsuite/ld-elf/comm-data5.d: Remove notarget for hppa.
	* testsuite/ld-scripts/defined6.d: Likewise.