upload_symbols: make sure to always spin down notify process

If an exception is thrown in the main upload loop for any reason, we never
call join on the process we spawned.  This means UploadSymbols will hang.
Put that into a finally block to avoid that.

BUG=chromium:209442
TEST=`./buildbot/run_tests` passes

Change-Id: I3ed8b5a9558f56a1aca25d9e0c8b756b5fa2e7f5
Reviewed-on: https://chromium-review.googlesource.com/190024
Reviewed-by: David James <davidjames@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed