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/build-support/setup-hooks/move-lib64.sh

@@ -0,0 +1,22 @@
+# This setup hook, for each output, moves everything in $output/lib64
+# to $output/lib, and replaces $output/lib64 with a symlink to
+# $output/lib. The rationale is that lib64 directories are unnecessary
+# in Nix (since 32-bit and 64-bit builds of a package are in different
+# store paths anyway).
+# If the move would overwrite anything, it should fail on rmdir.
+
+fixupOutputHooks+=(_moveLib64)
+
+_moveLib64() {
+    if [ "${dontMoveLib64-}" = 1 ]; then return; fi
+    if [ ! -e "$prefix/lib64" -o -L "$prefix/lib64" ]; then return; fi
+    echo "moving $prefix/lib64/* to $prefix/lib"
+    mkdir -p $prefix/lib
+    shopt -s dotglob
+    for i in $prefix/lib64/*; do
+        mv --no-clobber "$i" $prefix/lib
+    done
+    shopt -u dotglob
+    rmdir $prefix/lib64
+    ln -s lib $prefix/lib64
+}