build: increase saucelabs connect timeout

[devversion]

At some point we went down from a 2min wait timeout to 30seconds because we re-ran the startup script if something failed. Since re-running didn't really help and we removed it, we should move the timeout back to a longer period.

11 Dec 17:38:29 - Sauce Connect 4.5.2, build 4485 4a87b52 
11 Dec 17:38:29 - Using CA certificate bundle /etc/ssl/certs/ca-certificates.crt.
11 Dec 17:38:29 - Using CA certificate verify path /etc/ssl/certs.
11 Dec 17:38:29 - Starting up; pid 414
11 Dec 17:38:29 - Command line arguments: sauce-connect/bin/sc -u angular-ci -k **** --readyfile /tmp/material-saucelabs/readyfile --pidfile /tmp/material-saucelabs/pidfile --tunnel-identifier angular-material-25254-0 
11 Dec 17:38:29 - Log file: /tmp/sc-angular-material-25254-0.log
11 Dec 17:38:29 - Pid file: /tmp/material-saucelabs/pidfile
11 Dec 17:38:29 - Timezone: UTC GMT offset: 0h
11 Dec 17:38:29 - Using no proxy for connecting to Sauce Labs REST API.
11 Dec 17:38:31 - Started scproxy on port 40078.
11 Dec 17:38:31 - Please wait for 'you may start your tests' to start your tests.

// EXIT Timeout (30 seconds)

e.g. see: https://circleci.com/gh/angular/material2/25254 where it successfully acquired a tunnel, but just didn't have enough time to actually establish it.

[jelbourn]

LGTM

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