firestr: fix build (qt5.multimedia was missing)

pkgs/applications/networking/p2p/firestr/default.nix

···
 stdenv.mkDerivation {
   name = "firestr-0.8";
 
-  buildInputs = [ cmake boost botan snappy libopus libuuid qt5.base libXScrnSaver openssl ];
-
   src = fetchFromGitHub {
     owner  = "mempko";
     repo   = "firestr";
···
     sha256 = "0s2kdi8rw3i3f8gbiy0ykyi6xj5n8p80m0d1i86mhh8jpagvbfzb";
   };
 
+  buildInputs = [ cmake boost botan snappy libopus libuuid qt5.base qt5.multimedia
+                  libXScrnSaver openssl ];
+
   patches = ./return.patch;
 
-  postPatch =
-    ''
+  postPatch = ''
       substituteInPlace CMakeLists.txt \
         --replace "set(Boost_USE_STATIC_LIBS on)" "" \
         --replace "/usr/include/botan" "${botan}/include/botan" \
         --replace "libopus.a"       "libopus.so" \
         --replace "libsnappy.a"     "libsnappy.so" \
         --replace "libbotan-1.10.a" "libbotan-1.10.so.0"
-    '';
+  '';
 
-  meta = with stdenv.lib;
-    { description = "Grass computing platform";
-      homepage = http://firestr.com/;
-      license = licenses.gpl3;
-      maintainers = [ maintainers.emery ];
-      platforms = platforms.linux;
-    };
+  meta = with stdenv.lib; {
+    description = "Grass computing platform";
+    homepage = http://firestr.com/;
+    license = licenses.gpl3;
+    maintainers = [ maintainers.emery ];
+    platforms = platforms.linux;
+  };
 }