Merge branch 'js/valgrind'

* js/valgrind: valgrind: do not require valgrind 3.4.0 or newer test-lib: avoid assuming that templates/ are in the GIT_EXEC_PATH Tests: let --valgrind imply --verbose and --tee Add a script to coalesce the valgrind outputs t/Makefile: provide a 'valgrind' target test-lib.sh: optionally output to test-results/$TEST.out, too Valgrind support: check for more than just programming errors valgrind: ignore ldso and more libz errors Add valgrind support in test scripts