Testing parallel mode and PR34106

[Benjamin Kosnik]

> Should I be able to run "make check-parallel" with no FAILs?  Even
> before I touched any parallel headers I'm seeing several failures.

There are currently 10 fails in parallel mode. You're not going crazy.

;)

Here are the fails:

FAIL: 23_containers/headers/bitset/synopsis.cc (test for excess errors)
FAIL: 23_containers/headers/deque/synopsis.cc (test for excess errors)
FAIL: 23_containers/headers/list/synopsis.cc (test for excess errors)
FAIL: 23_containers/headers/map/synopsis.cc (test for excess errors)
FAIL: 23_containers/headers/set/synopsis.cc (test for excess errors)
FAIL: 23_containers/headers/vector/synopsis.cc (test for excess errors)
FAIL: 25_algorithms/partial_sort/moveable.cc (test for excess errors)
FAIL: 25_algorithms/sort/vectorbool.cc (test for excess errors)
FAIL: ext/mt_allocator/deallocate_local_thread-5.cc execution test
FAIL: ext/mt_allocator/deallocate_local_thread-7.cc execution test

Of these, the ones that say "synopsis" are not actually failures, as
these test cases test behavior prohibited by the standard (Redeclaring
std items.) I should probably mark these up, indicating this. 

I haven't had a chance to look much into the other issue, WRT atomics.
Sorry.

benjamin