libpipeline: Add package

[Bjørn Forsman: modify meta.description so that it doesn't include the
package name and doesn't end in a period.]

pkgs/development/libraries/libpipeline/default.nix

@@ -0,0 +1,17 @@
+{ stdenv, fetchurl }:
+ 
+stdenv.mkDerivation rec {
+  name = "libpipeline-1.2.6";
+  
+  src = fetchurl {
+    url = "mirror://savannah/libpipeline/${name}.tar.gz";
+    sha256 = "0wjsigim422ilzs46hxzv98l10zprpbk53gq3jzj6s9kn9n1wljc";
+  };
+
+  meta = with stdenv.lib; {
+    homepage = "http://libpipeline.nongnu.org";
+    description = "C library for manipulating pipelines of subprocesses in a flexible and convenient way";
+    platforms = platforms.unix;
+    license = licenses.gpl3;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -4948,6 +4948,8 @@ let
 
   libpcap = callPackage ../development/libraries/libpcap { };
 
+  libpipeline = callPackage ../development/libraries/libpipeline { };
+
   libpng = callPackage ../development/libraries/libpng { };
   libpng_apng = libpng.override { apngSupport = true; };
   libpng12 = callPackage ../development/libraries/libpng/12.nix { };