scripts: cros_generate_android_breakpad_symbols: Remove bad default arg.

Should not have a default argument to /tmp.

BUG=None
TEST=None

Change-Id: I14069e21a599615a57b53c7868763728f937ae8c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/4679247
Commit-Queue: David Riley <davidriley@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/cros_generate_android_breakpad_symbols.py b/scripts/cros_generate_android_breakpad_symbols.py
index 069617b..4ba8fc0 100644
--- a/scripts/cros_generate_android_breakpad_symbols.py
+++ b/scripts/cros_generate_android_breakpad_symbols.py
@@ -234,7 +234,7 @@
     parser.add_argument(
         "--breakpad_dir",
         type="path",
-        default="/tmp/breakpad",
+        required=True,
         help="Root directory for breakpad symbol files.",
     )