Use the ARM_THREAD_STATE32 flavor in the call to thread_get_state() when
running on 64-bit iOS 7+. If we don't iOS will assume we pass it an
arm_unified_thread_state_t while we actually pass it an arm_thread_state_t
which is a lot smaller. Without this fix thread_get_state() will corrupt the
stack and the app will crash.
Merge pull request #52 from robovm/thread_get_state_stack_corruption_on_ios_64bit

Use ARM_THREAD_STATE32 as flavor in call to thread_get_state (Darwin/AArch64)
Use ARM_UNIFIED_THREAD_STATE in the call to thread_get_state() on iOS7 64-bit
and up and iOS8 32-bit and up.
Fix setup_mark_lock missing prototype
(and do not call it if no parallel marker)

* include/private/pthread_support.h (GC_setup_mark_lock): Remove
prototype.
* misc.c (GC_init): Remove GC_setup_mark_lock call (move it to
GC_thr_init).
* pthread_support.c (setup_mark_lock): Rename from GC_setup_mark_lock;
add prototype (only if PARALLEL_MARK).
* pthread_support.c (GC_thr_init): Call setup_mark_lock() unless
available_markers_m1 is 0.
Relax mark_mutex attribute needed to disable elision (Linux/x64)

* pthread_support.c (setup_mark_lock): Pass PTHREAD_MUTEX_NORMAL
(instead of PTHREAD_MUTEX_ERRORCHECK) to pthread_mutexattr_settype
(actually, any valid settype call disables lock elision in glibc 2.19).
Update AUTHORS file
Also enable the TSX workaround for i386 (Linux)

* include/private/gcconfig.h (GLIBC_2_19_TSX_BUG): Define for
LINUX/I386 (if __GLIBC__).
Fix darwin_stop_world.c broken by 'thread_get_state fix' for other targets

* darwin_stop_world.c: Include Darwin-specific headers (sys/sysctl.h,
mach/machine.h) only if GC_DARWIN_THREADS.
Workaround 'unknown attribute __alloc_size__' warning for Clang 3.5 (trunk)

* include/gc_config_macros.h (GC_ATTR_ALLOC_SIZE): Define to empty if
clang 3.5.0 (workaround "unknown attribute '__alloc_size__' ignored"
warning in clang3.5 (trunk)).
Fix missing error handling of pthreads_mutex_init and cond_wait

* include/private/darwin_semaphore.h (sem_init): Destroy sem->mutex if
sem->cond initialization failed.
* include/private/darwin_semaphore.h (sem_post): Ignore
pthread_mutex_unlock result in case of pthread_cond_signal.
* include/private/darwin_semaphore.h (sem_wait): Unlock mutex and
return error (-1) if pthread_cond_wait failed.
* include/private/darwin_semaphore.h (sem_init): If pshared then
return -1 (with the appropriate errno code set) instead of ABORT.
* include/private/darwin_semaphore.h (sem_init, sem_post, sem_wait):
Treat non-zero value returned by pthread functions as error (instead
of only negative values).
* include/private/darwin_semaphore.h (sem_init, sem_post, sem_wait):
Reformat code.
* misc.c (GC_init): Abort (with the appropriate message) if
pthread_mutex[attr]_init failed (SN_TARGET_PS3 case only).
* specific.c (GC_key_create_inner): If pthread_mutex_init failed then
return its error code.
Fix __alloc_size__ availability detection (Clang)

Since __clang_major__/__clang_minor__ etc. are vendor dependent values,
we cannot implement the feature detection based on it.
For example, Apple clang versioning is different from the FreeBSD clang.
(At this time, Apple clang version is "6.0 (clang-600.0.51)" and
__clang_major__ is 6.)
Instead of this, we can use the clang feature detection macro,
__has_attribute.

* include/gc_config_macros.h (GC_ATTR_ALLOC_SIZE): Replace predefined
__clang_major/minor__ testing with __has_attribute() one (in case of
clang).
Fix missing error handling of pthread_attr_init/getstacksize

* misc.c (GC_init): Explicitly ignore returned value of
pthread_mutexattr_destroy.
* os_dep.c (GC_get_main_stack_base, GC_get_stack_base, GC_dirty_init):
Likewise.
* pthread_support.c (start_mark_threads, pthread_create): Likewise.
* tests/test.c (main): Likewise.
* win32_threads.c (start_mark_threads): Likewise.
* pthread_support.c (pthread_create): ABORT (with the appropriate
message) in case of pthread_attr_getstacksize or pthread_attr_init
failure.
* tests/test.c (main): Print error code and FAIL if pthread_attr_init
or pthread_attr_setstacksize failed (only if GC_PTHREADS).
Fix missing msvc_dbg.h in dist_noinst_HEADERS (Automake)

* include/include.am (dist_noinst_HEADERS): Add msvc_dbg.h entry.
Fix missing cord_pos.h, ec.h among installed headers (Automake)

* cord/cord.am (pkginclude_HEADERS): Add cord_pos.h, ec.h entries.
Merge remote-tracking branch 'upstream/master' into thread_get_state_stack_corruption_on_ios7_64bit_and_ios8

Conflicts:
	darwin_stop_world.c
Fixed up includes after merge with upstream.
Merge branch 'thread_get_state_stack_corruption_on_ios7_64bit_and_ios8'