hugin: use glew-egl to fix startup crash

Currently, hugin crashes on startup with an unhelpful

ERROR: 21:14:22.923574 (/build/hugin-2021.0.0/src/hugin1/hugin/GLViewer.cpp:133) SetUpContext(): Error initialising GLEW: Unknown error.

As outlined in [1], this is caused by glew being compiled without egl
support. As such, switching to glew-egl fixes the problem and hugin
starts up fine.

[1]: https://bbs.archlinux.org/viewtopic.php?id=278127

pkgs/applications/graphics/hugin/default.nix

@@ -13,7 +13,7 @@
 , fftw
 , flann
 , gettext
-, glew
+, glew-egl
 , ilmbase
 , lcms2
 , lensfun
@@ -56,7 +56,7 @@ stdenv.mkDerivation rec {
     fftw
     flann
     gettext
-    glew
+    glew-egl
     ilmbase
     lcms2
     lensfun