Gnuradio: Add gnuradio-wrapper and gnuradio-full.

gnuradio-wrapper is a simple derivation wrapping $(gnuradio)/bin/* to
make other blocks (from `extraPackages') available.

gnuradio-full uses gnuradio-wrapper to build gnuradio with blocks from
gnuradio-osmosdr (therefore allowing the use of rtl-sdr, hackrf, the
ccc-camp2015 badge, and similar).

pkgs/applications/misc/gnuradio/wrapper.nix

@@ -0,0 +1,23 @@
+{ stdenv, gnuradio, makeWrapper, python
+, extraPackages ? [] }:
+
+with stdenv.lib;
+
+stdenv.mkDerivation {
+  name = (appendToName "with-packages" gnuradio).name;
+  buildInputs = [ makeWrapper python ];
+
+  buildCommand = ''
+    mkdir -p $out/bin
+    ln -s "${gnuradio}"/bin/* $out/bin/
+
+    for file in "$out"/bin/*; do
+        wrapProgram "$file" \
+            --prefix PYTHONPATH : ${stdenv.lib.concatStringsSep ":"
+                                      (map (path: "$(toPythonPath ${path})") extraPackages)} \
+            --prefix GRC_BLOCKS_PATH : ${makeSearchPath "share/gnuradio/grc/blocks" extraPackages}
+    done
+
+  '';
+  inherit (gnuradio) meta;
+}

pkgs/top-level/all-packages.nix

@@ -11309,6 +11309,12 @@ let
     fftw = fftwFloat;
   };
 
+  gnuradio-wrapper = callPackage ../applications/misc/gnuradio/wrapper.nix { };
+
+  gnuradio-full = gnuradio-wrapper.override {
+    extraPackages = [ gnuradio-osmosdr ];
+  };
+
   gnuradio-osmosdr = callPackage ../applications/misc/gnuradio-osmosdr { };
 
   goldendict = callPackage ../applications/misc/goldendict { };