[commit: base] ghc-7.4's head updated: Roll back the sigset capi changes (a3451b8)

[Ian Lynagh]

Repository : ssh://darcs.haskell.org//srv/darcs/packages/base

Branch 'ghc-7.4' now includes:

     6874f4f... Convert come FFI bindings to use the capi calling convention
     c0ee7bd... Add a way to get hold of the current call stack
     630f44d... Use capi some more (part of #5480)
     1bde0e5... Use capi to define the fcntl FFI imports
     71157d6... Use utf8 when decoding cost centre strings
     8812b67... Expand the stack-tracing API
     41bf1ae... Add traceStack :: String -> a -> a
     0ced3ed... Change the layout of stack traces
     87f88de... Add source locations to call stack entries.
     a3451b8... Roll back the sigset capi changes