tests: Add optional use of timeout utility, if present.

Each top level test (basic, corpus, etc...) is run with a fixed
timeout of 2 minutes.

The goal here is to treat a hung test as a failure. The emacs test for
sending mail is known to be problematic on the Debian
autobuilders. This is both a bandaid fix for that, and a sensible long
term feature.
(cherry picked from commit 5f99c80e02736c90495558d9b88008a768876b29)

0 files changed, 0 insertions, 0 deletions