* gdb.server/ext-attach.exp: Use standard_testfile,

	* gdb.server/ext-attach.exp: Use standard_testfile,
	prepare_for_testing.
	* gdb.server/ext-run.exp: Use standard_testfile,
	build_executable.
	* gdb.server/file-transfer.exp: Use standard_testfile,
	prepare_for_testing.
	* gdb.server/server-exec-info.exp: Use standard_testfile.
	* gdb.server/server-mon.exp: Use standard_testfile,
	prepare_for_testing.
	* gdb.server/server-run.exp: Use standard_testfile,
	build_executable.
	* gdb.server/solib-list.exp: Use standard_testfile,
	standard_output_file.