[GHC] #13583: configure.ac: handle AR=, NM= and other flags as arguments to ./configure

[GHC]

#13583: configure.ac: handle AR=, NM= and other flags as arguments to ./configure
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        Reporter:  slyfox            |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by angerman):

 Just to be clear, my issue is not with gold per se. My issue is that we
 make assumptions about the naming of the linker. If my gold is called ld,
 or x-y-z-ld.gold or my-lovely-linker, I'm running into issues. This
 becomes evident probably only when using custom toolchains.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13583#comment:6>
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