upgraded gdb, gdb-cross & gdb-cross-canadian recipes.
ignore_whitespace_changes.patch : this patch is not needed anymore
because the newer version fixed the issue differently.
rebased other patches to the newer version of the source code.
Added the --with-libelf line in the gdb-common.inc to fix a
configure faulre.
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Nitin A Kamble