Fix test names starting with uppercase using multi-line gdb_test_multiple

Fix test names starting with uppercase using multi-line gdb_test_multiple

This fixes offender testcases that have test names starting with uppercase
when using gdb_test_multiple in a multi-line construct.

gdb/testsuite/ChangeLog
2016-12-01  Luis Machado  <lgustavo@codesourcery.com>

	* gdb.cp/gdb2495.exp: Replace gdb_test_multiple
	with gdb_test_no_output.
	Use command as test name.