Reset poky to before our libpam hacks

Things got a bit out of synch with openbmc-config due to the libpam
issues and the migration from the meta-* layers.

Revert the two previous commits and then put the latest poky in with the
libpam revert and get openbmc-config right again.

Revert "Revert "libpam: update 1.3.1 -> 1.5.1""

This reverts commit 87ddd3eab4df68e624b5350ccaab28b3b97547c0.

Revert "poky: subtree update:796be0593a..10c69538c0"

This reverts commit c723b72979bfac6362509cf1fe086900f6641f28.

Change-Id: I3a1f405193aee6a21fe0cd24be9927c143a23d9a
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/poky/documentation/ref-manual/migration-1.7.rst b/poky/documentation/ref-manual/migration-1.7.rst
index 54544e4..19275b3 100644
--- a/poky/documentation/ref-manual/migration-1.7.rst
+++ b/poky/documentation/ref-manual/migration-1.7.rst
@@ -190,7 +190,7 @@
 
 The following recipes have been removed:
 
--  ``x-load``: This recipe has been superseded by U-Boot SPL for all
+-  ``x-load``: This recipe has been superseded by U-boot SPL for all
    Cortex-based TI SoCs. For legacy boards, the ``meta-ti`` layer, which
    contains a maintained recipe, should be used instead.