GitLab

and use it to skip the th, ghci and debugger tests when GHC is profiled.

The coercion optimiser is stressed by optimisation.
I don't think this will slow down the test runs much

Instead of calling "ghc-pkg list" and "ghc-pkg field" for each
package, call "ghc-pkg dump" and grep the output.  Saves a few seconds
on Windows for 'make TEST=foo'.