swig: use pname and standardize meta

- pname makes it easier to override the version in an overlay and looks generally cleaner
- Updated the meta sections to match between the various versions

No real functional change, just cleanup.

pkgs/development/tools/misc/swig/2.x.nix

@@ -1,7 +1,7 @@
 { lib, stdenv, fetchFromGitHub, autoconf, automake, libtool, bison, pcre }:
 
 stdenv.mkDerivation rec {
-  name = "swig-${version}";
+  pname = "swig";
   version = "2.0.12";
 
   src = fetchFromGitHub {
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
 
   configureFlags = [ "--without-tcl" ];
 
+  # Disable ccache documentation as it needs yodl
   postPatch = ''
-    # Disable ccache documentation as it need yodl
     sed -i '/man1/d' CCache/Makefile.in
   '';
 
@@ -25,26 +25,11 @@ stdenv.mkDerivation rec {
     ./autogen.sh
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "SWIG, an interface compiler that connects C/C++ code to higher-level languages";
-
-    longDescription = ''
-       SWIG is an interface compiler that connects programs written in C and
-       C++ with languages such as Perl, Python, Ruby, Scheme, and Tcl.  It
-       works by taking the declarations found in C/C++ header files and using
-       them to generate the wrapper code that scripting languages need to
-       access the underlying C/C++ code.  In addition, SWIG provides a variety
-       of customization features that let you tailor the wrapping process to
-       suit your application.
-    '';
-
     homepage = http://swig.org/;
-
-    # Licensing is a mess: http://www.swig.org/Release/LICENSE .
-    license = "BSD-style";
-
-    platforms = lib.platforms.linux ++ lib.platforms.darwin;
-
-    maintainers = [ ];
+    # Different types of licenses available: http://www.swig.org/Release/LICENSE .
+    license = licenses.gpl3Plus;
+    platforms = with platforms; linux ++ darwin;
   };
 }