ghcjs tests not running because the compiler version check is nonsensical #61710
Description
We noticed that ghcjs packages always run with --disable-tests.
This is most likely accidental, because we have in the generic Haskell builder:
For ghcjs, ghc.version is 0.2.020170323.
So the tests don't run because 0.2.020170323 < 7.4.
The problem here is that ghcjs uses a different versioning scheme from ghc.