[GHC] #11354: Install script installs docs without -version suffix

[GHC]

#11354: Install script installs docs without -version suffix
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        Reporter:  osa1              |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Build System      |              Version:  7.0.1
      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:D1868
       Wiki Page:                    |
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Comment (by Thomas Miedema <thomasmiedema@…>):

 In [changeset:"b61f5f734d08fe9cdca3ac06560fc15e97aa77ab/ghc"
 b61f5f73/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="b61f5f734d08fe9cdca3ac06560fc15e97aa77ab"
 Put docs in /usr/share/doc/ghc-<version>

 `make install` puts libraries in a direcory containing the version
 number. Do the same for the docs, such that multiple installs can live
 side-by-side.

 Delete unused ghcdocdir.

 Test Plan:
 ```
 ./boot
 ./configure
 make show! VALUE=docdir
 ```

 Reviewed by: bgamari

 Differential Revision: https://phabricator.haskell.org/D1868

 GHC Trac Issues: #11354
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11354#comment:2>
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