Add tests

hpc-bin.cabal

test/Combine/Tests.hs

test/Combine/gold/Help.stdout

test/GHC/Tests.hs

test/GHC/gold/T11798.stdout

test/GHC/gold/T17073.stdout

test/GHC/gold/T20568.stdout

test/GHC/inputs/.keepme.hpc.T10138/Main.mix

test/GHC/inputs/T10138.keepme.tix

test/GHC/inputs/T11798.hs

test/GHC/inputs/T17073.hs

test/GHC/inputs/T20568.hs

test/GHC/inputs/T2991.hs

test/GHC/inputs/T2991LiterateModule.lhs

test/Main.hs

test/Map/Tests.hs

test/Map/gold/Help.stdout

test/README.md

test/Report/Tests.hs

test/Report/gold/Help.stdout