skeleton-rev.bbclass: bump version

Change-Id: Ibec49aeea5d234ba1aca56d76baf8118becdf176
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/classes/skeleton-rev.bbclass b/classes/skeleton-rev.bbclass
index d245b9d..c192790 100644
--- a/classes/skeleton-rev.bbclass
+++ b/classes/skeleton-rev.bbclass
@@ -1,2 +1,2 @@
-SRCREV ?= "51e0b89808b44838722f5572375f7e546897a41b"
+SRCREV ?= "39df4035c0dc3cb3ae8131b93ae9641e0d1e7f83"
 SKELETON_URI ?= "git://github.com/openbmc/skeleton"