* syscalls.cc (stat64_to_stat32): Transform st_dev correctly.

	* syscalls.cc (stat64_to_stat32): Transform st_dev correctly.
	(fstat64): Add evaluating st_ino and st_dev.
	(stat_worker): Evaluate st_dev as 32 bit value.
	* include/cygwin/stat.h: Use new dev_t definition throughout.
	* include/cygwin/types.h: Define __dev16_t and __dev32_t.  Define
	dev_t according to __CYGWIN_USE_BIG_TYPES__ setting.
	* include/sys/sysmacros.h: Define major, minor and makedev
	according to __CYGWIN_USE_BIG_TYPES__ setting.