Add dhcp-done to base meson.build

Allow dhcp-done to be part of the presubmit builds.

Change-Id: Ic80658916a2c6de75f279ebc9698a8f189fa36de
Signed-off-by: Willy Tu <wltu@google.com>
diff --git a/meson.build b/meson.build
index 63208d8..e405f0c 100644
--- a/meson.build
+++ b/meson.build
@@ -42,4 +42,5 @@
   subproject('metrics-ipmi-blobs', default_options: 'tests=' + tests_str)
   subproject('nemora-postd')
   subproject('libcr51sign')
+  subproject('dhcp-done')
 endif