[commit: ghc] wip/travis's head updated: Try travis again with CPUS=2 (78a58e6)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/travis' now includes:

     da7cfa9 Richards optCoercion improvement made test cases fail the nice way
     ef4e8c5 Test Trac #9323
     8b6cd6e Include test case name in performance result
     13cb4c2 Adjust a few performance numbers
     10f3d39 Correctly round when calculating the deviation
     78a58e6 Try travis again with CPUS=2