libgphoto2: fix build of all camlibs

The camlibs `lumix` and `docupen` were excluded from compilation and
bundling due to the missing depdendencies.

pkgs/development/libraries/libgphoto2/default.nix

@@ -1,10 +1,18 @@
-{ lib, stdenv, fetchFromGitHub, buildPackages
+{ lib
-, autoreconfHook, pkg-config, gettext
+, stdenv
+, fetchFromGitHub
+, buildPackages
+, autoreconfHook
+, pkg-config
+, gettext
 , libusb1
 , libtool
 , libexif
 , libgphoto2
 , libjpeg
+, curl
+, libxml2
+, gd
 }:
 
 stdenv.mkDerivation rec {
@@ -24,12 +32,16 @@ stdenv.mkDerivation rec {
     autoreconfHook
     gettext
     libtool
+    pkg-config
   ];
 
   buildInputs = [
     libjpeg
     libtool # for libltdl
     libusb1
+    curl
+    libxml2
+    gd
   ];
 
   # These are mentioned in the Requires line of libgphoto's pkg-config file.
@@ -37,12 +49,15 @@ stdenv.mkDerivation rec {
 
   hardeningDisable = [ "format" ];
 
-  postInstall = let
+  postInstall =
-    executablePrefix = if stdenv.buildPlatform == stdenv.hostPlatform then
+    let
+      executablePrefix =
+        if stdenv.buildPlatform == stdenv.hostPlatform then
           "$out"
         else
           buildPackages.libgphoto2;
-  in ''
+    in
+    ''
       mkdir -p $out/lib/udev/rules.d
       ${executablePrefix}/lib/libgphoto2/print-camera-list \
           udev-rules version 175 group camera \