arc: Organize files to split arcvm ebuild

Move init/arcvm-server-proxy.conf to under vsock_proxy
Delete BUILD.gn. ebuild will directly use vsock_proxy/BUILD.gn.

The same things for arc/vm/aunch.

BUG=b:137955471
TEST=emerge-${BOARD} vsock-proxy

Cq-Depend: chromium:1725754
Change-Id: I5c6321492f40440d48cc85c3075ab9bac1a52d2d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/1724398
Tested-by: Ryo Hashimoto <hashimoto@chromium.org>
Reviewed-by: Alex Lau <alexlau@chromium.org>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
diff --git a/arc/vm/BUILD.gn b/arc/vm/BUILD.gn
deleted file mode 100644
index 7707ccd..0000000
--- a/arc/vm/BUILD.gn
+++ /dev/null
@@ -1,11 +0,0 @@
-# Copyright 2018 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-group("all") {
-  deps = [
-    "launch:all",
-    "libvda:all",
-    "vsock_proxy:all",
-  ]
-}
diff --git a/arc/vm/init/arcvm.conf b/arc/vm/launch/init/arcvm.conf
similarity index 100%
rename from arc/vm/init/arcvm.conf
rename to arc/vm/launch/init/arcvm.conf
diff --git a/arc/vm/init/dbus-1/ArcVmUpstart.conf b/arc/vm/launch/init/dbus-1/ArcVmUpstart.conf
similarity index 100%
rename from arc/vm/init/dbus-1/ArcVmUpstart.conf
rename to arc/vm/launch/init/dbus-1/ArcVmUpstart.conf
diff --git a/arc/vm/init/arcvm-server-proxy.conf b/arc/vm/vsock_proxy/init/arcvm-server-proxy.conf
similarity index 100%
rename from arc/vm/init/arcvm-server-proxy.conf
rename to arc/vm/vsock_proxy/init/arcvm-server-proxy.conf