Bug 514613 again (closing </still_reachable> xml tag)
Always close the tag after the heuristic details.
Add 4 testcases, one with no errors, one with a simple leak,
one with a simple reachable and one "Xmas tree" test (in
reference to the TCP/IP Christmas tree packet
https://en.wikipedia.org/wiki/Christmas_tree_packet). That
has most of the errors that memcheck can produce.
All of these tests get checked by xmllint.
(cherry picked from commit 65d41bffbec97e0174db7101a42fb8a8cca21666)
16 files changed
