Update charset/collation to spec re Drupal docs

Author: JacobSanford

build/scripts/pre-init.d/60_install_drupal.sh

@@ -26,7 +26,7 @@ then
     echo "Creating Drupal database and user..."
     PREINSTALL_SQL=$(printf "%s\n" \
       "DROP DATABASE IF EXISTS $DRUPAL_DB_NAME;" \
-      "CREATE DATABASE $DRUPAL_DB_NAME CHARACTER SET utf8 COLLATE utf8_general_ci;" \
+      "CREATE DATABASE $DRUPAL_DB_NAME CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;" \
       "CREATE USER '$DRUPAL_DB_USER'@'%' IDENTIFIED BY '$DRUPAL_DB_PASSWORD';" \
       "GRANT ALL PRIVILEGES ON $DRUPAL_DB_NAME.* TO '$DRUPAL_DB_USER'@'%' IDENTIFIED BY '$DRUPAL_DB_PASSWORD';" \
       "FLUSH PRIVILEGES;")