* gdb.base/interrupt.exp: Add i*86-*-linux* setup_xfail for

	* gdb.base/interrupt.exp: Add i*86-*-linux* setup_xfail for
	"p func1 ()" and note that rests of tests are skipped.
	* gdb.base/corefile.exp: Add i*86-*-linux* and m68*-*-hpux*
 	setup_xfails for "print func2::coremaker_local".
	Add i*86-*-linux* setup_xfail for "backtrace in corefile.exp".
	* gdb.base/mips_pro.exp: Restart gdb in this test so it isn't
	affected by the previous run test.
	* gdb.chill/misc.exp: Add m68*-*-hpux* setup_xfails for
	"print array () ubyte (foo)" and "print/x array () byte (\$i)"
	* gdb.chill/pr-8742.exp: Add m68*-*-hpux* setup_xfails for
	"pass int powerset tuple" and "pass modeless int powerset tuple".
	* gdb.chill/tests2.exp: Add m68*-*-hpux* setup xfails for
	"real write 4" and "real write 8".
	* gdb.shill/tuples.exp: Add i*86-*-linux* and m68*-*-hpux*
 	setup_xfails for "print vs1 after tuple assign 2",
	"print \$i after tuple assign 2", and
	"print vs2 after tuple assign 2".
	* lib/gdb.exp (gdb_test): When a gdb aborts, print a more
	meaningful error message and return -1 so the caller can
	suppress further tests and avoid a cascade of errors.