Refactor ./hadrian/ghci.sh for better error messages
By separating these two lines, if the first command fails then ghci is
not loaded. Before it would still load ghci but display lots of errors
about not being able to find modules.
By separating these two lines, if the first command fails then ghci is
not loaded. Before it would still load ghci but display lots of errors
about not being able to find modules.