fix(ios-template): bundle script string escape

[frankcalise]

Summary:

By default, if you init an iOS project in a directory that contains spaces, it will fail in the Build Phase of Bundle React Native code and images. Removing the space from the directory, the project can successfully build. This is due to an improperly escaped string in the script found in the iOS project file.

Changelog:

[IOS] [FIXED] - iOS project will build successfully if spaces are present in the project path

Test Plan:

1. mkdir -p ~/code/test dir
2. npx @react-native-community/cli@latest init TestingSpaces
3. npm run ios

Observe the build fails due to the Build Phase of Bundle React Native code and images

Modify the shell script in the build phase to:

set -e

export CONFIG_JSON=$(sed -e "s|HELLOWORLD_PATH|$(realpath "${SRCROOT}/../")|g" "${SRCROOT}/../.react-native.config")

WITH_ENVIRONMENT="$REACT_NATIVE_PATH/scripts/xcode/with-environment.sh"
REACT_NATIVE_XCODE="$REACT_NATIVE_PATH/scripts/react-native-xcode.sh"

/bin/sh -c "\"$WITH_ENVIRONMENT\" \"$REACT_NATIVE_XCODE\""

Run the iOS application again and see that it builds successfully