patch applied (ghc-6.8/ghc): Add a --names-only flag for list --simple-output

[Simon Marlow]

Fri Sep  7 11:19:44 PDT 2007  Ian Lynagh <igloo at earth.li>
  * Add a --names-only flag for list --simple-output
  We use this in the testsuite to find out which libraries we should run
  the tests from.

    M ./utils/ghc-pkg/Main.hs -2 +7