[GHC] #15145: Emit info-level log message when package environments have been picked up

[GHC]

#15145: Emit info-level log message when package environments have been picked up
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        Reporter:  hvr               |                Owner:  hvr
            Type:  feature request   |               Status:  merge
        Priority:  high              |            Milestone:  8.4.3
       Component:  Compiler          |              Version:  8.0.2
      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:D4689
       Wiki Page:                    |
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Comment (by bgamari):

 This sounds reasonable enough to me in light of the recent discussion.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15145#comment:5>
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