Added library helper functions.  Docker is-tty, append semi-colon so bash will not complain about an incomplete line

Change-Id: I94d1b39910b8b437788438fd38931866763d0508
diff --git a/config.mk b/config.mk
index aad0f8e..bb620d6 100644
--- a/config.mk
+++ b/config.mk
@@ -28,4 +28,6 @@
 
 # Note[1] - Plenty of source to cleanup
 
+# USE_DOCKER_MK    := true
+
 # [EOF]