capstone: use Makefile build (for pkg-config files)

The cmake based build system did not install the pkg-config files for
capstone, which made builds depending on capstone harder to write as
they cannot automatically find the location of the capstone library.

pkgs/development/libraries/capstone/default.nix

···
-{ stdenv, fetchurl, bash, cmake }:
+{ stdenv, fetchurl, bash }:
 
 stdenv.mkDerivation rec {
   name    = "capstone-${version}";
···
     sha256 = "1whl5c8j6vqvz2j6ay2pyszx0jg8d3x8hq66cvgghmjchvsssvax";
   };
 
-  buildInputs = [ cmake ];
+  configurePhase = '' patchShebangs make.sh '';
+  buildPhase = '' ./make.sh '';
+  installPhase = '' env PREFIX=$out ./make.sh install '';
+
   enableParallelBuilding = true;
 
   meta = {