meta-google: images: Add dummy-gbmc-update

For gbmc override, add dummy-gbmc-update

Google-Bug-Id: 179618452
Google-Bug-Id: 179618500
Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: I09925bb262f7a535ff569689a37640a028a09137
diff --git a/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend b/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
index e01b3a6..2dd1c2b 100644
--- a/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
+++ b/meta-google/recipes-phosphor/images/obmc-phosphor-image.bbappend
@@ -19,3 +19,6 @@
 OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = " ipmitool"
 OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = " iotools"
 OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = " lrzsz"
+
+# Add gBMC update recipes
+OBMC_IMAGE_EXTRA_INSTALL_append_gbmc = " dummy-gbmc-update"