* Makefile.in (libcygwin.a): Move --target flag from here...
(toolopts): to here, to be used by both mkimport and speclib.
* speclib: Omit leading underscore in symbol names on x86_64.
	* fhandler.cc (fhandler_base::raw_read): Rearrange code to use
	NtReadFile and to fix problem using pointer to wrongly sized variable
	on x86_64.
	(fhandler_base::read): Drop redundant code.
	* fhandler_disk_file.cc (fhandler_disk_file::pread): Fix function
	to not read the information twice.  Handle STATUS_END_OF_FILE.