uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/applications/science/math/sage/env-locations.nix

@@ -0,0 +1,48 @@
+{ writeTextFile
+, pari_data
+, pari
+, singular
+, maxima
+, conway_polynomials
+, graphs
+, elliptic_curves
+, polytopes_db
+, gap
+, combinatorial_designs
+, jmol
+, mathjax
+, three
+, cysignals
+}:
+
+# A bash script setting various environment variables to tell sage where
+# the files its looking fore are located. Also see `sage-env`.
+writeTextFile rec {
+  name = "sage-env-locations";
+  destination = "/${name}";
+  text = ''
+    export GP_DATA_DIR="${pari_data}/share/pari"
+    export PARI_DATA_DIR="${pari_data}"
+    export GPHELP="${pari}/bin/gphelp"
+    export GPDOCDIR="${pari}/share/pari/doc"
+    export SINGULARPATH='${singular}/share/singular'
+    export SINGULAR_SO='${singular}/lib/libSingular.so'
+    export GAP_SO='${gap}/lib/libgap.so'
+    export SINGULAR_EXECUTABLE='${singular}/bin/Singular'
+    export MAXIMA_FAS='${maxima}/lib/maxima/${maxima.version}/binary-ecl/maxima.fas'
+    export MAXIMA_PREFIX="${maxima}"
+    export CONWAY_POLYNOMIALS_DATA_DIR='${conway_polynomials}/share/conway_polynomials'
+    export GRAPHS_DATA_DIR='${graphs}/share/graphs'
+    export ELLCURVE_DATA_DIR='${elliptic_curves}/share/ellcurves'
+    export POLYTOPE_DATA_DIR='${polytopes_db}/share/reflexive_polytopes'
+    export GAP_ROOT_DIR='${gap}/share/gap/build-dir'
+    export ECLDIR='${maxima.lisp-compiler}/lib/${maxima.lisp-compiler.pname}-${maxima.lisp-compiler.version}/'
+    export COMBINATORIAL_DESIGN_DATA_DIR="${combinatorial_designs}/share/combinatorial_designs"
+    export CREMONA_MINI_DATA_DIR="${elliptic_curves}/share/cremona"
+    export JMOL_DIR="${jmol}/share/jmol" # point to the directory that contains JmolData.jar
+    export JSMOL_DIR="${jmol}/share/jsmol"
+    export MATHJAX_DIR="${mathjax}/lib/node_modules/mathjax"
+    export THREEJS_DIR="${three}/lib/node_modules/three"
+    export SAGE_INCLUDE_DIRECTORIES="${cysignals}/${cysignals.pythonModule.sitePackages}"
+  '';
+}