[GHC] #8785: Replace hooks API in the RTS with something better

[GHC]

#8785: Replace hooks API in the RTS with something better
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       Reporter:  simonmar          |             Owner:  simonmar
           Type:  task              |            Status:  new
       Priority:  high              |         Milestone:  7.10.1
      Component:  Runtime System    |           Version:  7.6.3
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 Hooks rely on static linking behaviour which doesn't always work: we have
 to disable -Bsymbolic for the RTS on Linux (see
 `compiler/main/SysTools.lhs`) and it apparently doesn't work at all on Mac
 (#8754).

 So instead of hooks we should be passing in information when we initialize
 the RTS, like we already do for some other things (`-rtsopts` etc.).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8785>
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