Replace dstat with pcp-dstat

The dstat project is no longer maintained.

The pcp-dstat package installs a dstat command so no further updates to
the scripts should be needed.

Change-Id: Ied8c9d29bed4f887c364db7080a0f2a0c02328af
Signed-off-by: Lucas Alvares Gomes <lucasagomes@gmail.com>
diff --git a/files/debs/dstat b/files/debs/dstat
index 2b643b8..40d00f4 100644
--- a/files/debs/dstat
+++ b/files/debs/dstat
@@ -1 +1,2 @@
-dstat
+dstat # dist:bionic
+pcp