initfs: add missing dependencies

Add a missing runtime dependency on base-utils.

Found the missing dependency on the shell while comparing initfs to
OE-Core's initrdscripts/initramfs-framework.

Change-Id: Ia43495245f37e7f48c5508ee42540abea7ab0659
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-phosphor/initrdscripts/obmc-phosphor-initfs.bb b/common/recipes-phosphor/initrdscripts/obmc-phosphor-initfs.bb
index 970af47..6d0c70e 100644
--- a/common/recipes-phosphor/initrdscripts/obmc-phosphor-initfs.bb
+++ b/common/recipes-phosphor/initrdscripts/obmc-phosphor-initfs.bb
@@ -7,6 +7,8 @@
 
 inherit allarch
 
+RDEPENDS_${PN} += "${VIRTUAL-RUNTIME_base-utils}"
+
 S = "${WORKDIR}"
 SRC_URI += "file://obmc-init.sh"
 SRC_URI += "file://obmc-shutdown.sh"