readline: prepare for readline6.3 upstream patches

readline: prepare for readline6.3 upstream patches

Upstream patches are always preferred to be applied first (before
integration patches). In order to apply readline-6.3 specific upstream
patches in a preferred order we need to apply the integration-patches
at the end in the 6.3 specific recipe (this is already the case
for readline-5.2).

Also take the oppertunity to move 'norpath.patch' to readline-6.3 dir
since this patch is not shared between the 5.2 and 6.3 recipe.

[YOCTO #8451]

Signed-off-by: Petter Mabäcker <petter@technux.se>
Signed-off-by: Ross Burton <ross.burton@intel.com>