fix(bundler): set ARCH env var for appimagetool

Author: FabianLars

.changes/bundler-appimage-arch-env.md

@@ -0,0 +1,5 @@
+---
+tauri-bundler: "patch:bug"
+---
+
+The bundler now sets the `ARCH` env var to the current build target to prevent potential issues with `appimagetool`'s auto-detection.

crates/tauri-bundler/src/bundle/linux/appimage.rs

@@ -33,7 +33,12 @@ pub fn bundle_project(settings: &Settings) -> crate::Result<Vec<PathBuf>> {
     }
   };
 
-  let tools_arch = settings.target().split('-').next().unwrap();
+  let tools_arch = if settings.binary_arch() == Arch::Armhf {
+    "armhf"
+  } else {
+    settings.target().split('-').next().unwrap()
+  };
+
   let output_path = settings.project_out_directory().join("bundle/appimage");
   if output_path.exists() {
     fs::remove_dir_all(&output_path)?;
@@ -181,6 +186,7 @@ pub fn bundle_project(settings: &Settings) -> crate::Result<Vec<PathBuf>> {
 
   let mut cmd = Command::new(linuxdeploy_path);
   cmd.env("OUTPUT", &appimage_path);
+  cmd.env("ARCH", tools_arch);
   cmd.args([
     "--appimage-extract-and-run",
     "--verbosity",