more extra-libs for ghc 6.6

[Simon Marlow]

Bulat Ziganshin wrote:

> how about adding to the list of extra libs the following very useful ones:
> 
> regex-*
> FilePath
> MissingH
> Edison

Let me echo what Ian said: the idea with extralibs was not to bundle useful 
stuff with GHC, but rather to *separate* from GHC as many of the bundled 
libraries as we can.  In the future we will probably drop extralibs altogether - 
it's only purpose is to reduce the surprise level for people used to all the 
bundled libs in GHC 6.4.2.

Cheers,
	Simon