Bump version to 3.2.0
Update README.md for voltha-2.6 release
Update BUILDING.md file for using BAL3.4.9.6 package
Update debian package files to build for BAL 3.4.9.6
Fix issue in dev_mgmt_daemon service script

Change-Id: I0853bef9f30f67b8db0868f6dbb92c8248ce0130
diff --git a/agent/device/asfvolt16/mkdebian/debian/control b/agent/device/asfvolt16/mkdebian/debian/control
index abacf17..d7cc78d 100644
--- a/agent/device/asfvolt16/mkdebian/debian/control
+++ b/agent/device/asfvolt16/mkdebian/debian/control
@@ -9,5 +9,5 @@
 Architecture: amd64
 Depends: ${shlibs:Depends}
 Description: Broadcom OLT drivers,CLI
-  ported from Broadcom SDK-3.4.7.5 package
+  ported from Broadcom SDK-3.4.9.6 package