testsuite: Remove Unicode literals from driver
testsuite: Remove Unicode literals from driver

They are not supported by Python 3.0, 3.1, and 3.2 (but are supported by
>= 3.3; silliness!)

Test Plan: Validate on python 3.2

Reviewers: austin

Subscribers: simonpj, thomie

Differential Revision: https://phabricator.haskell.org/D2778

GHC Trac Issues: #12909, #9184

sdiehl/ghc,ezyang/ghc,olsner/ghc,sdiehl/ghc,olsner/ghc,olsner/ghc,ezyang/ghc,shlevy/ghc,ezyang/ghc,mettekou/ghc,olsner/ghc,shlevy/ghc,shlevy/ghc,sdiehl/ghc,shlevy/ghc,mettekou/ghc,mettekou/ghc,mettekou/ghc,olsner/ghc,olsner/ghc,shlevy/ghc,ezyang/ghc,ezyang/ghc,sdiehl/ghc,sdiehl/ghc,olsner/ghc,ezyang/ghc,shlevy/ghc,sdiehl/ghc,mettekou/ghc,mettekou/ghc,sdiehl/ghc,mettekou/ghc,ezyang/ghc,shlevy/ghc