* exceptions.cc (exception::myfault_handle): Fix typo in comment.
	* exceptions.cc (exception::myfault_handle): Rephrase comment.
	* thread.cc (pthread::create): Use PTHREAD_DEFAULT_STACKSIZE stacksize
	if attr.stacksize is 0.
	(pthread_attr::pthread_attr): Initialize stacksize to 0 to align more
	closely to Linux.
	(pthread_attr_getstack): Fix incorrect stackaddr computation.  Return
	stackaddr just like pthread_attr_getstackaddr.  Remove slightly off
	comment.
	(pthread_attr_getstackaddr): Remove slightly off comment.
	(pthread_getattr_np): Return stackaddr and stacksize based on the full
	allocated stackarea.
[aarch64] Add memchr.

2014-07-11  K�vin Petit  <kevin.petit@arm.com>

	* libc/machine/aarch64/memchr.S: New file.
	* libc/machine/aarch64/memchr-stub.c: New file.
	* libc/machine/aarch64/Makefile.am: Add the new files.
	* libc/machine/aarch64/Makefile.in: Regenerated.
	* thread.cc (pthread_mutex::pthread_mutex): Change default type
	to PTHREAD_MUTEX_NORMAL.
	(pthread_mutex::unlock): Return EPERM if the mutex has no owner and
	the mutex type is PTHREAD_MUTEX_ERRORCHECK, as on Linux.
	(pthread_mutexattr::pthread_mutexattr): Ditto.
	(pthread_mutex_unlock): Do not fail if mutex is a normal mutex
	initializer.
	* include/pthread.h (PTHREAD_MUTEX_INITIALIZER): Redefine as
	PTHREAD_NORMAL_MUTEX_INITIALIZER_NP.
	* uinfo.cc (cygheap_domain_info::init): Correctly set
	lowest_tdo_posix_offset to UNIX_POSIX_OFFSET.
	(fetch_posix_offset): Redesign to fake a POSIX offset in all cases
	where we can't fetch a non-0 POSIX offset from our primary domain.
	* libc/include/sys/errno.h: Fix comments.
	* libc/string/strerror.c: Fix documentation.
	(_strerror_r): Handle ENETRESET, EILSEQ, ENODATA, ECONNRESET,
	EADDRNOTAVAIL, EOVERFLOW.  Fix strings for EMFILE and EDOM.
* sigproc.cc (send_sig): Fix bad format in diagnostic output.