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/meta/classes/linuxloader.bbclass b/poky/meta/classes/linuxloader.bbclass
index b161c51..720e5df 100644
--- a/poky/meta/classes/linuxloader.bbclass
+++ b/poky/meta/classes/linuxloader.bbclass
@@ -1,6 +1,6 @@
 def get_musl_loader_arch(d):
     import re
-    ldso_arch = "NotSupported"
+    ldso_arch = None
 
     targetarch = d.getVar("TARGET_ARCH")
     if targetarch.startswith("microblaze"):
@@ -32,7 +32,7 @@
 def get_glibc_loader(d):
     import re
 
-    dynamic_loader = "NotSupported"
+    dynamic_loader = None
     targetarch = d.getVar("TARGET_ARCH")
     if targetarch in ["powerpc", "microblaze"]:
         dynamic_loader = "${base_libdir}/ld.so.1"
@@ -58,7 +58,7 @@
     overrides = d.getVar("OVERRIDES").split(":")
 
     if "libc-baremetal" in overrides:
-        return "NotSupported"
+        return None
 
     if "libc-musl" in overrides:
         dynamic_loader = get_musl_loader(d)