sm6225-common: Build vndservice and vndservicemanager from source

Change-Id: Ie3d77ac84df5a14c902f8ae515f00ea9ad9c44da
diff --git a/common.mk b/common.mk
index 43fffa6..697e2f1 100644
--- a/common.mk
+++ b/common.mk
@@ -93,3 +93,8 @@
 
 PRODUCT_PACKAGES_DEBUG += \
     update_engine_client
+
+# Vendor service manager
+PRODUCT_PACKAGES += \
+    vndservice \
+    vndservicemanager