Enable ghcjs' -build-runner explicitly for exe/test/benches

This way, we automatically gain *some* level of support for
`build-tools-depends` as well as for `v2-install` for applications
which are executed via nodejs

For instance, the following now works:

  $ cabal v2-install -w /opt/ghcjs/8.4/bin/ghcjs --ghcjs alex --symlink-bindir=/tmp/bin
  Resolving dependencies...
  Build profile: -w ghcjs-8.4.0.1 -O1
  In order, the following will be built (use -v for more details):
   - alex-3.2.4 (exe:alex) (requires build)
  Starting     alex-3.2.4 (exe:alex)
  Building     alex-3.2.4 (exe:alex)
  Installing   alex-3.2.4 (exe:alex)
  Completed    alex-3.2.4 (exe:alex)
  Symlinking 'alex'

  $ file - < /tmp/bin/alex
  /dev/stdin: a /usr/bin/nodejs script, UTF-8 Unicode text executable

  $ /tmp/bin/alex  --version
  Alex version 3.2.4, (c) 2003 Chris Dornan and Simon Marlow

This is the best we can without teaching cabal about cross-compilation
and distinguishing local native executables (build by a native-targetting
haskell compiler) for build-tools/custom-setup vs
the main compilation goals for the target platform (which is build with
a haskell cross-compiler).

Author: hvr

Cabal/Distribution/Simple/GHCJS.hs

@@ -563,8 +563,11 @@ buildOrReplExe mReplFlags verbosity numJobs _pkg_descr lbi
   let isGhcjsDynamic      = isDynamic comp
       dynamicTooSupported = supportsDynamicToo comp
       buildRunner = case clbi of
-                       ExeComponentLocalBuildInfo {} -> False
-                       _                             -> True
+                      LibComponentLocalBuildInfo   {} -> False
+                      FLibComponentLocalBuildInfo  {} -> False
+                      ExeComponentLocalBuildInfo   {} -> True
+                      TestComponentLocalBuildInfo  {} -> True
+                      BenchComponentLocalBuildInfo {} -> True
       isHaskellMain = elem (takeExtension srcMainFile) [".hs", ".lhs"]
       jsSrcs        = jsSources exeBi
       cSrcs         = cSources exeBi ++ [srcMainFile | not isHaskellMain]