Change 'len''s type from LONGEST to ULONGEST: gdbarch methods core_xfer_shared_librar...

Change 'len''s type from LONGEST to ULONGEST: gdbarch methods core_xfer_shared_libraries and core_xfer_shared_libraries_aix

This patch changes the type of 'len' from LONGEST to ULONGEST.  'len'
is the argument of gdbarch methods core_xfer_shared_libraries and
core_xfer_shared_libraries_aix.

gdb:

2014-01-14  Yao Qi  <yao@codesourcery.com>

	* gdbarch.sh (core_xfer_shared_libraries): Change its argument
	'len''s type to ULONGEST.
	(core_xfer_shared_libraries_aix): Likewise.
	* gdbarch.c, gdbarch.h: Reenerated.
	* i386-cygwin-tdep.c (windows_core_xfer_shared_libraries):
	Change type of 'len' to ULONGEST.
	* rs6000-aix-tdep.c (rs6000_aix_ld_info_to_xml): Likewise.
	(rs6000_aix_core_xfer_shared_libraries_aix): Likewise.