Fix workaround in pthread destructor

Amends dcdfb6908db0f83cbc4e550859f56ee58a6b3420 which failed to take the
workaround in destroy_current_thread_data into account.

Since pthread_getspecific was completely replaced with the thread_local variable
currentThreadData, the workaround has no effect anymore. Therefore we need to
replace it with a workaround that makes sure currentThreadData is set inside of
the destructor function.

This prevents a leak, where QThreadPrivate::finish() tries to access the
thread data, but since it already is null, recreates it without ever deleting it.

Pick-to: 5.15
Change-Id: I3811d262a411a6bde9d6eb90f8d17e0bbc5de657
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

0 files changed, 0 insertions, 0 deletions