fix(app, ios): fail build with error if firebase.json has syntax errors

- if firebase.json parse has an error, don't substitute empty JSON, exit 1 instead
- commit test app pod install result with updated script into test app project file

Author: MichaelVerdon

packages/app/ios_config.sh

@@ -88,7 +88,10 @@ done
 
 if [[ ${_SEARCH_RESULT} ]]; then
   _JSON_OUTPUT_RAW=$(cat "${_SEARCH_RESULT}")
-  _RN_ROOT_EXISTS=$(ruby -Ku -e "require 'rubygems';require 'json'; output=JSON.parse('$_JSON_OUTPUT_RAW'); puts output[$_JSON_ROOT]" || echo '')
+  if ! _RN_ROOT_EXISTS=$(ruby -Ku -e "require 'json'; output=JSON.parse('$_JSON_OUTPUT_RAW'); puts output[$_JSON_ROOT]"); then
+    echo "error: Failed to parse firebase.json, check for syntax errors."
+    exit 1
+  fi
 
   if [[ ${_RN_ROOT_EXISTS} ]]; then
     if ! python3 --version >/dev/null 2>&1; then echo "python3 not found, firebase.json file processing error." && exit 1; fi