Squash commits for public release

build/boot/arm64/BUILD.gn

@@ -0,0 +1,31 @@
+# Use a strange __EMPTY_PATH_, empty string can't be passed as an arg.
+path_to_bins = "__EMPTY_PATH_"
+if (host == "llvm") {
+  path_to_bins = llvm_bin_path
+}
+
+devtree_compile_script_args = [
+  rebase_path("//firmware/$target_arch/$target_board.odt", root_build_dir),
+  rebase_path("$root_out_dir/firmware/$target_board.obt", root_build_dir),
+  "$target_arch",
+  "$target_board",
+  "$host",
+  "$path_to_bins",
+]
+
+action("devtree_compile") {
+  script = "//build/kernel/devtree_compile.py"
+  inputs = [ "//firmware/$target_arch/$target_board.odt" ]
+  outputs = [
+    "$root_out_dir/firmware/$target_board.obt",
+    "$root_out_dir/firmware/$target_board.obto",
+  ]
+  args = devtree_compile_script_args
+}
+
+group("bootarm64") {
+  deps = [
+    ":devtree_compile",
+    "rawImage:rawImage",
+  ]
+}