actions: Add destroy action

Add an action to destroy an object on signal match.

Change-Id: I23fb160bcf7507d0d0a5f2d82f1cfb24131adf76
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/examples/match2.yaml b/examples/match2.yaml
index 8cfa105..269a469 100644
--- a/examples/match2.yaml
+++ b/examples/match2.yaml
@@ -18,5 +18,7 @@
             - value: xyz.openbmc_project.Testing
             - value: TestProperty
             - value: teststring
+      action:
+          name: destroyObject("Example")
 
 # vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4