upload_symbols: Increase UPLOAD_MIN_TIMEOUT

Connection set up may sometimes take more than 3 minutes.
Increase UPLOAD_MIN_TIMEOUT to be robust against this.

BUG=chromium:692976
TEST=./scripts/upload_symbols_unittest

Change-Id: Id1abc1f0770763c1595aa330406d42d915c51957
Reviewed-on: https://chromium-review.googlesource.com/443946
Commit-Ready: Ryo Hashimoto <hashimoto@chromium.org>
Tested-by: Ryo Hashimoto <hashimoto@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/upload_symbols.py b/scripts/upload_symbols.py
index 59215ac..0e6ca69 100644
--- a/scripts/upload_symbols.py
+++ b/scripts/upload_symbols.py
@@ -112,7 +112,7 @@
 # The lowest timeout (in seconds) we'll allow.  If the server is overloaded,
 # then there might be a delay in setting up the connection, not just with the
 # transfer.  So even a small file might need a larger value.
-UPLOAD_MIN_TIMEOUT = 2 * 60
+UPLOAD_MIN_TIMEOUT = 5 * 60
 
 
 # Sleep for 500ms in between uploads to avoid DoS'ing symbol server.