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/logic/elan/0001-dynamically-patchelf-binaries.patch

@@ -0,0 +1,35 @@
+diff --git a/src/elan-dist/src/component/package.rs b/src/elan-dist/src/component/package.rs
+index c51e76d..ae8159e 100644
+--- a/src/elan-dist/src/component/package.rs
++++ b/src/elan-dist/src/component/package.rs
+@@ -56,6 +56,30 @@ fn unpack_without_first_dir<R: Read>(archive: &mut tar::Archive<R>, path: &Path)
+         entry
+             .unpack(&full_path)
+             .chain_err(|| ErrorKind::ExtractingPackage)?;
++        nix_patch_if_needed(&full_path)?;
++    }
++
++    Ok(())
++}
++
++fn nix_patch_if_needed(dest_path: &Path) -> Result<()> {
++    let is_bin = matches!(dest_path.parent(), Some(p) if p.ends_with("bin"));
++    if is_bin {
++        let _ = ::std::process::Command::new("@patchelf@/bin/patchelf")
++            .arg("--set-interpreter")
++            .arg("@dynamicLinker@")
++            .arg(dest_path)
++            .output();
++    }
++
++    if dest_path.file_name() == Some(::std::ffi::OsStr::new("leanc")) {
++        use std::os::unix::fs::PermissionsExt;
++        let new_path = dest_path.with_extension("orig");
++        ::std::fs::rename(dest_path, &new_path)?;
++        ::std::fs::write(dest_path, format!(r#"#! @shell@
++LEAN_CC="${{LEAN_CC:-@cc@}}" exec -a "$0" {} "$@" -L {}/lib  # use bundled libraries, but not bundled compiler that doesn't know about NIX_LDFLAGS
++"#, new_path.to_str().unwrap(), dest_path.parent().unwrap().parent().unwrap().to_str().unwrap()))?;
++        ::std::fs::set_permissions(dest_path, ::std::fs::Permissions::from_mode(0o755))?;
+     }
+ 
+     Ok(())