Prevent strings that are not to be localized from being exported

[dzhang]

Background

There are strings used that are being included in the localization export that do not require translation.

Examples are

• "www.website.com"
• "1."
• "2."

A solution for setting their values while excluding them automatically using needs-translation (​https://github.com/adblockplus/needs-translation)

What to change

1. Prevent the values that will not be translated from being included during export of strings for translation.

[dzhang]

The following exclusions should cover strings not to be translated.

const sourcesExcluded =
  [
    "$(PRODUCT_DISPLAY_NAME)",
    "$(PRODUCT_NAME)",
    "1.",
    "2.",
    "www.website.com"
  ];