Ignore backup files left by emacs.

Test: Added a file like this locally and the upload hook didn't care
Bug: None
Change-Id: I4c33f2517a9a83c7797d3ea9074fffeedf85dcaa
diff --git a/libc/tools/generate_notice.py b/libc/tools/generate_notice.py
index e0e6b32..9b53f9f 100755
--- a/libc/tools/generate_notice.py
+++ b/libc/tools/generate_notice.py
@@ -38,6 +38,9 @@
         return False
     if path.name in {"notice", "readme", "pylintrc"}:
         return False
+    # Backup files for some editors.
+    if path.match("*~"):
+        return False
     return True