[GHC] #12485: -package-db flags now need to be sorted by dependency order

[GHC]

#12485: -package-db flags now need to be sorted by dependency order
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        Reporter:  niteria           |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.0.2
       Component:  Package system    |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  phab:D2450
       Wiki Page:                    |
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Comment (by ezyang):

 Sorry, this fell off my radar after niteria said that he was going to fix
 it.

 If you revert this patch, bootstrapping will break, so that's probably not
 a good idea. Let me see if I can fix it.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12485#comment:6>
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