Fixing missing README.md files, Makefile tweaks

Change-Id: Ibd7a24634dc359a7bb657aa4753db9e912925d71
diff --git a/.gitignore b/.gitignore
index c19dd4e..71e3fcf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@
 voltha-openonu-adapter
 voltha-protos
 voltha-system-tests
+voltctl
 
 # IDEs
-.idea
\ No newline at end of file
+.idea