update XcodeBuildVersion when Archive

updateXcodeBuildVersion.sh

if [ $CONFIGURATION == Release ]; then
    echo "Bumping build number..."
    plist=${PROJECT_DIR}/${INFOPLIST_FILE}

	#increment the build number (ie 115 to 116)
    buildnum=$(/usr/libexec/PlistBuddy -c "Print CFBundleVersion" "${plist}")
    if [[ "${buildnum}" == "" ]]; then
        echo "No build number in $plist"
        exit 2
    fi

    buildnum=$(expr $buildnum + 1)
    /usr/libexec/Plistbuddy -c "Set CFBundleVersion $buildnum" "${plist}"
    echo "Bumped build number to $buildnum"

else
    echo $CONFIGURATION " build - Not bumping build number."
fi