meta-google: gbmc-update: Fix version output

If we ever have a directory with a VERSION file and version directory,
it will write both versions. This is incorrect behavior.

Change-Id: Ic6737836ab4c59c32dd3d9c78b76f222558d92a4
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-phosphor/flash/gbmc-update/75-gbmc-upgrade.sh b/meta-google/recipes-phosphor/flash/gbmc-update/75-gbmc-upgrade.sh
index 87a1219..1831d49 100644
--- a/meta-google/recipes-phosphor/flash/gbmc-update/75-gbmc-upgrade.sh
+++ b/meta-google/recipes-phosphor/flash/gbmc-update/75-gbmc-upgrade.sh
@@ -60,13 +60,17 @@
   local imgdir="${sig%/*}"
   if [ -f "$imgdir/VERSION" ]; then
     cat "$imgdir/VERSION" || return
+    return 0
   fi
 
   # Staging packages have a directory named after the version
   local vdir="${imgdir##*/}"
   if [[ "$vdir" =~ ([0-9]+[.]){3}[0-9]+ ]]; then
     echo "$vdir"
+    return 0
   fi
+
+  return 1
 )
 
 GBMC_BR_DHCP_HOOKS+=(gbmc_upgrade_hook)