[fuchsia] [packaging] undle host binaries per runtime_mode (flutter#1…

…3335)

tools/fuchsia/fuchsia_host_bundle.gni

@@ -2,9 +2,13 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("$flutter_root/common/fuchsia_config.gni")
+
 template("fuchsia_host_bundle") {
   assert(defined(invoker.name), "'name' must be defined for $target_name.")
-  dest_dir = "${root_out_dir}/host_bundle/${invoker.name}-${host_os}-${host_cpu}"
+
+  _dest_dir_base = "${root_out_dir}/host_bundle"
+  _dest_dir = "${_dest_dir_base}/${invoker.name}-${flutter_runtime_mode}-${host_os}-${host_cpu}"
 
   copy(target_name) {
     if (defined(invoker.deps)) {
@@ -14,7 +18,7 @@ template("fuchsia_host_bundle") {
     sources = invoker.sources
 
     outputs = [
-      "$dest_dir/{{source_file_part}}",
+      "${_dest_dir}/{{source_file_part}}",
     ]
   }
 }