core_xfer_shared_libraries and core_xfer_shared_libraries_aix returns ULONGEST

core_xfer_shared_libraries and core_xfer_shared_libraries_aix returns ULONGEST

This patch documents the return value of core_xfer_shared_libraries_aix
and core_xfer_shared_libraries gdbarch methods, and changes return
type to ULONGEST from LONGEST.

In a following patch, core_xfer_partial. is changed to check their
return values and return an appropriate target_xfer_status.

gdb:

2014-02-07  Yao Qi  <yao@codesourcery.com>

	* gdbarch.sh (core_xfer_shared_libraries): Returns ULONGEST.  Add
	comments.
	(core_xfer_shared_libraries_aix): Likewise.
	* gdbarch.c, gdbarch.h: Regenerated.
	* i386-cygwin-tdep.c (windows_core_xfer_shared_libraries): Return
	ULONGEST.  Change 'len_avail' type to ULONGEST.
	* rs6000-aix-tdep.c (rs6000_aix_ld_info_to_xml): Likewise.
	* rs6000-aix-tdep.h (rs6000_aix_ld_info_to_xml): Update
	declaration.
	(rs6000_aix_core_xfer_shared_libraries_aix): Return ULONGEST.