fix openFile003 test on Solaris/i386 (platform output is not needed anymore)

Test Plan: validate

Reviewers: austin

Reviewed By: austin

Subscribers: phaskell, simonmar, relrod, ezyang, carter

Differential Revision: https://phabricator.haskell.org/D114
fix topHandler03 execution on Solaris where shell signals SIGTERM correctly

Summary:
This patch fixes topHandler03 execution on Solaris where
shell correctly signals SIGTERM as exit status 15.

Test Plan: validate

Reviewers: austin

Reviewed By: austin

Subscribers: phaskell, simonmar, relrod, ezyang, carter

Differential Revision: https://phabricator.haskell.org/D112