Merge remote-tracking branch 'origin/wip/tsan/all'

.gitlab-ci.yml

configure.ac

hadrian/hadrian.cabal

hadrian/src/Flavour.hs

hadrian/src/Settings.hs

hadrian/src/Settings/Flavours/ThreadSanitizer.hs

includes/Rts.h

includes/rts/OSThreads.h

includes/rts/SpinLock.h

includes/rts/StablePtr.h

includes/rts/TSANUtils.h

includes/rts/storage/ClosureMacros.h

includes/rts/storage/Closures.h

includes/rts/storage/GC.h

includes/stg/SMP.h

libraries/base/GHC/Event/Control.hs

rts/.tsan-suppressions

rts/Capability.c

rts/Capability.h

rts/Messages.c