hunspell-hs: fix build

Using pkgconfig like jtojnar suggested.

Disables tests as some necessary data files
aren't included on hackage.

pkgs/development/haskell-modules/configuration-common.nix

@@ -672,6 +672,9 @@ self: super: {
   # https://github.com/bos/bloomfilter/issues/7
   bloomfilter = appendPatch super.bloomfilter ./patches/bloomfilter-fix-on-32bit.patch;
 
+  # https://github.com/ashutoshrishi/hunspell-hs/pull/3
+  hunspell-hs = addPkgconfigDepend (dontCheck (appendPatch super.hunspell-hs ./patches/hunspell.patch)) pkgs.hunspell;
+
   # https://github.com/pxqr/base32-bytestring/issues/4
   base32-bytestring = dontCheck super.base32-bytestring;
 

pkgs/development/haskell-modules/patches/hunspell.patch

@@ -0,0 +1,30 @@
+diff -Naur hunspell-hs-0.1.0.0.orig/hunspell-hs.cabal hunspell-hs-0.1.0.0/hunspell-hs.cabal
+--- hunspell-hs-0.1.0.0.orig/hunspell-hs.cabal	2018-08-26 20:23:33.053763300 +0200
++++ hunspell-hs-0.1.0.0/hunspell-hs.cabal	2018-08-26 20:42:05.886074510 +0200
+@@ -37,7 +37,7 @@
+       base >=4.7 && <5
+     , stm
+   if os(linux)
+-    extra-libraries:
++    pkgconfig-depends:
+         hunspell
+   if os(darwin)
+     include-dirs:
+@@ -63,7 +63,7 @@
+     , hunspell-hs
+     , stm
+   if os(linux)
+-    extra-libraries:
++    pkgconfig-depends:
+         hunspell
+   if os(darwin)
+     include-dirs:
+@@ -88,7 +88,7 @@
+     , hunspell-hs
+     , stm
+   if os(linux)
+-    extra-libraries:
++    pkgconfig-depends:
+         hunspell
+   if os(darwin)
+     include-dirs: