move up skeleton for flash fix

During testing found a pnor locked problem
diff --git a/common/recipes-phosphor/skeleton/skeleton.bb b/common/recipes-phosphor/skeleton/skeleton.bb
index 9547f30..19ef6bc 100644
--- a/common/recipes-phosphor/skeleton/skeleton.bb
+++ b/common/recipes-phosphor/skeleton/skeleton.bb
@@ -16,7 +16,7 @@
 RDEPENDS_${PN} += "python-subprocess python-tftpy"
 SRC_URI += "git://github.com/openbmc/skeleton"
 
-SRCREV = "597d49e68e8bf0ddedb2e01cbd3fb500ee1c22e3"
+SRCREV = "31e38ab580a2e4f5d52089a7de5c474e5c76dbaf"
 
 S = "${WORKDIR}"