Use effective target instead of -std in dg-options

Use effective target instead of -std in dg-options

	* testsuite/20_util/hash/chi2_q_bit_flip_set.cc: Use effective target
	instead of -std in dg-options.
	* testsuite/20_util/hash/chi2_q_bit_string_set.cc: Likewise.
	* testsuite/20_util/hash/chi2_q_numeric_pattern_set.cc: Likewise.
	* testsuite/20_util/hash/chi2_q_uniform_random.cc: Likewise.
	* testsuite/20_util/hash/quality.cc: Likewise.
	* testsuite/25_algorithms/heap/moveable.cc: Likewise.
	* testsuite/25_algorithms/heap/moveable2.cc: Likewise.
	* testsuite/25_algorithms/nth_element/random_test.cc: Likewise.
	* testsuite/25_algorithms/partial_sort/random_test.cc: Likewise.
	* testsuite/25_algorithms/partial_sort_copy/random_test.cc: Likewise.
	* testsuite/25_algorithms/sort/random_test.cc: Likewise.

From-SVN: r239547