[GHC] #6160: support sub-second resolutions for file timestamps

[GHC]

#6160: support sub-second resolutions for file timestamps
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 Reporter:  redneb            |          Owner:                  
     Type:  feature request   |         Status:  new             
 Priority:  normal            |      Component:  libraries/unix  
  Version:  7.4.2             |       Keywords:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
  Failure:  None/Unknown      |       Testcase:                  
Blockedby:                    |       Blocking:                  
  Related:                    |  
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 Currently all file timestamps related functions (accessTime,
 modificationTime, statusChangeTime, setFileTimes) offer resolution of one
 second. Most modern posix systems support better resolutions for file
 timestamps.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6160>
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