Add excelsior-vpu-prebuilts to dependencies.

Change-Id: I518db0cbfadca2220914349bfe76ca015a291b7c
diff --git a/debian/control b/debian/control
index 9519cfa..3c0fa5e 100644
--- a/debian/control
+++ b/debian/control
@@ -12,6 +12,7 @@
          excelsior-img-fw,
          excelsior-bluetooth,
          excelsior-mtkcam,
+         excelsior-vpu-prebuilts,
          linux-image-4.4.22-mtk,
          mendel-core,
          lk-bootloader,