phosphor-mapper.bb: bump version

Change-Id: I44deb99114e98942e0a8c4eae1336265f13782f0
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/common/recipes-phosphor/dbus/phosphor-mapper.bb b/common/recipes-phosphor/dbus/phosphor-mapper.bb
index 8c34677..6131bc3 100644
--- a/common/recipes-phosphor/dbus/phosphor-mapper.bb
+++ b/common/recipes-phosphor/dbus/phosphor-mapper.bb
@@ -24,7 +24,7 @@
         "
 SRC_URI += "git://github.com/openbmc/phosphor-objmgr"
 
-SRCREV = "c7a7c45fec58ff593aecce92699b9ee41823d48e"
+SRCREV = "b2f2681fc8289f1089fb616b1156802251f4721f"
 
 S = "${WORKDIR}/git"