chore: Fix GitHub Actions script

[tenzen-y]

What this PR does / why we need it:

In PR #1440, I forgot to put a space in exit1, so I fixed it.

Which issue(s) this PR fixes (optional, in Fixes #<issue number>, #<issue number>, ... format, will close the issue(s) when PR gets merged):
Fixes #

[coveralls]

Pull Request Test Coverage Report for Build 1511085386

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.07%) to 26.693%

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Totals
Change from base Build 1510732302:	0.07%
Covered Lines:	1604
Relevant Lines:	6009

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💛 - Coveralls

[terrytangyuan]

/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tenzen-y, terrytangyuan

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