icecat: add release icecat-140.7.0-1gnu1 for aramo

icecat/taskcluster/gecko_taskgraph/transforms/fetch.py

@@ -202,6 +202,7 @@ def make_task(config, jobs):
             # download.
             Required("key-path"): str,
         },
+        Optional("headers"): [str],
         # The name to give to the generated artifact. Defaults to the file
         # portion of the URL. Using a different extension converts the
         # archive to the given type. Only conversion to .tar.zst is
@@ -265,6 +266,9 @@ def create_fetch_url_task(config, name, fetch):
             ]
         )
 
+    for header in fetch.get("headers", []):
+        command.extend(["--header", header])
+
     command.extend(
         [
             fetch["url"],