testsuite_containergen.h: New.

2013-10-23  Chris Jefferson  <chris@bubblescope.net>
	    Paolo Carlini  <paolo.carlini@oracle.com>

	* testsuite/util/testsuite_containergen.h: New.
	* testsuite/util/testsuite_iterators.h (test_container<>::val): Add.
	* testsuite/25_algorithms/nth_element/random_test.cc: New, use the
	above.
	* 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.

Co-Authored-By: Paolo Carlini <paolo.carlini@oracle.com>

From-SVN: r203995