meta-google: gbmc-mac-config: Fix for single quotes

Change-Id: Idc9f3be1f11612f093b12df79365c7c66667eb04
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-google/networking/gbmc-mac-config.bb b/meta-google/recipes-google/networking/gbmc-mac-config.bb
index 861d0a6..7e7f996 100644
--- a/meta-google/recipes-google/networking/gbmc-mac-config.bb
+++ b/meta-google/recipes-google/networking/gbmc-mac-config.bb
@@ -35,7 +35,7 @@
   fi
 
   # Build time dictionary sanity check
-  bash -c 'declare -A dict=(${GBMC_MAC_IF_MAP})'
+  bash -c "declare -A dict=(${GBMC_MAC_IF_MAP})"
 
   sed gbmc-mac-config.sh.in \
     -e 's#@EEPROM@#${GBMC_MAC_EEPROM_OF_NAME}#' \