phosphor-mapper.bb: bump version

Change-Id: I6258f0694a0d7fe62be0c2911c68657a59aca449
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-phosphor/common/recipes-phosphor/dbus/phosphor-mapper.bb b/meta-phosphor/common/recipes-phosphor/dbus/phosphor-mapper.bb
index 16f022a..10a013b 100644
--- a/meta-phosphor/common/recipes-phosphor/dbus/phosphor-mapper.bb
+++ b/meta-phosphor/common/recipes-phosphor/dbus/phosphor-mapper.bb
@@ -35,7 +35,7 @@
         "
 SRC_URI += "git://github.com/openbmc/phosphor-objmgr"
 
-SRCREV = "167e2379abb36d8c813fed0ee1da3b79715d477a"
+SRCREV = "b6593863280280f7e1f623b5f76fdf2f7ff6b621"
 
 S = "${WORKDIR}/git"