meta-phosphor: Add mapper dependency to time mgr

Without the mapper installed, phosphor-time-manager fails like this at
startup:

terminate called after throwing an instance of
'sdbusplus::exception::SdBusError'
   what(): sd_bus_call: org.freedesktop.DBus.Error.ServiceUnknown: The
name is not activatable

Add a runtime dependency on the mapper.

(From meta-phosphor rev: 4a1d82df5ec6ddc45783b384e51d7ddb265836bd)

Change-Id: Ic1176617b9385a1ca4aae6a1180785c2a7ab5dee
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/recipes-phosphor/datetime/phosphor-time-manager_git.bb b/meta-phosphor/recipes-phosphor/datetime/phosphor-time-manager_git.bb
index 38b4aef..eb6adb3 100644
--- a/meta-phosphor/recipes-phosphor/datetime/phosphor-time-manager_git.bb
+++ b/meta-phosphor/recipes-phosphor/datetime/phosphor-time-manager_git.bb
@@ -21,6 +21,7 @@
 RDEPENDS_${PN} += "libsystemd"
 RDEPENDS_${PN} += "sdbusplus"
 RDEPENDS_${PN} += "phosphor-dbus-interfaces"
+RDEPENDS_${PN} += "phosphor-mapper"
 
 SRC_URI += "git://github.com/openbmc/phosphor-time-manager"
 SRCREV = "6aca02e07aeb607f7f44a3381216e57c059d6900"