[Updater] Send email with only relative path

Test: local run
Change-Id: I1924a07058524eb0bf034dae541a8171e6287f1b
diff --git a/external_updater.py b/external_updater.py
index 749fb21..5e2e944 100644
--- a/external_updater.py
+++ b/external_updater.py
@@ -129,7 +129,8 @@
 def _check_some(paths, delay):
     results = {}
     for path in paths:
-        results[path] = _process_update_result(path)
+        relative_path = fileutils.get_relative_project_path(path)
+        results[relative_path] = _process_update_result(path)
         time.sleep(delay)
     return results
 
@@ -141,7 +142,8 @@
         if fileutils.METADATA_FILENAME in files:
             # Skip sub directories.
             dirs[:] = []
-            results[path] = _process_update_result(path)
+            relative_path = fileutils.get_relative_project_path(path)
+            results[relative_path] = _process_update_result(path)
             time.sleep(delay)
     return results
 
@@ -204,7 +206,7 @@
         git_utils.push(full_path, args.remote_name)
 
     if args.branch_and_commit:
-        git_utils.checkout(full_path, 'aosp/master')
+        git_utils.checkout(full_path, args.remote_name + '/master')
 
 
 def parse_args():