Import strings: set target-language to en-US, rewrite original path t…

…o en.lproj

.github/scripts/translate_reference.py

@@ -46,6 +46,14 @@ def main():
             print(e)
             continue
 
+        # Use en.lproj instead of en-US.lproj, make sure that target-language
+        # is set to en-US.
+        for file_node in root.xpath("//x:file", namespaces=NS):
+            file_node.set("target-language", "en-US")
+            file_node.set(
+                "original", file_node.get("original").replace("en-US.lproj", "en.lproj")
+            )
+
         for trans_node in root.xpath("//x:trans-unit", namespaces=NS):
             for source in trans_node.xpath("./x:source", namespaces=NS):
                 reference = source.text

.github/workflows/import_strings.yml

@@ -62,7 +62,8 @@ jobs:
           cp ../firefoxios-l10n/en-US/*.xliff "${start_folder}/l10n_repo/en-US/"
 
           # Make sure that the reference locale (en-US) has translations, i.e.
-          # targets defined and identical to the source.
+          # targets defined and identical to the source. Also rewrite paths to
+          # use en.lproj instead of en-US.lproj.
           python "${start_folder}/l10n_repo/.github/scripts/translate_reference.py" --path "${start_folder}/l10n_repo/en-US"
 
           # Copy strings over from es-ES to es