skeleton-rev.bbclass: bump version

Change-Id: Icd82ac0a68b7409dceed0d713429da0dffa3fa88
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/classes/skeleton-rev.bbclass b/classes/skeleton-rev.bbclass
index fcca548..febed0b 100644
--- a/classes/skeleton-rev.bbclass
+++ b/classes/skeleton-rev.bbclass
@@ -1,2 +1,2 @@
-SRCREV ?= "6b1f0f5063eff534ff9edae58253da56b8aea734"
+SRCREV ?= "c99bd0c47ac238bfd3ca46ab9a2effc504e12b7a"
 SKELETON_URI ?= "git://github.com/openbmc/skeleton"