Ignore test output created by GHC test suite.
Ignore test output created by GHC test suite.

Signed-off-by: Edward Z. Yang <dbd597f5635f432486c5d365e9bb585b3eaa1853@cs.stanford.edu>

rimmington/unix,thomie/unix,thomie/unix,rimmington/unix,rimmington/unix,rimmington/unix