sdbusplus.bb: bump version

Change-Id: I06b2f44f53346a7949c95a57c493b58eaaf3adda
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/common/recipes-extended/sdbusplus/sdbusplus.bb b/common/recipes-extended/sdbusplus/sdbusplus.bb
index 210fa9e..b12c081 100644
--- a/common/recipes-extended/sdbusplus/sdbusplus.bb
+++ b/common/recipes-extended/sdbusplus/sdbusplus.bb
@@ -36,7 +36,7 @@
         "
 
 SRC_URI += "git://github.com/openbmc/sdbusplus"
-SRCREV = "28dc36d509ba8f77ffb5726cc7d5f0184f8054b1"
+SRCREV = "a4b4a0be8b3529112dbb26b0ae941186ae667666"
 
 PACKAGECONFIG ??= "libsdbusplus transaction"
 PACKAGECONFIG[libsdbusplus] = "--enable-libsdbusplus,--disable-libsdbusplus,systemd,libsystemd"