The malloc_zone.cpp test currently fails on Darwin hosts, in SanitizerCommon tests with lsan enabled.
Need to XFAIL this test to buy time to investigate this failure. Also
we're trying to bring the number of test failing on Darwin bots to 0, to
get clearer signal of any new failures.
rdar://145873843
Co-authored-by: Mariusz Borsa <m_borsa@apple.com>
(cherry picked from commit 02837acaaf2cfdfcbf77e4a7f6629575edb6ffb4)
ac31db0463