vendor: Include dev-keys if exists

Change-Id: I972ab1217edf8dc84959251838d3781da2b175aa
Signed-off-by: Jis G Jacob <studiokeys@blissroms.org>
diff --git a/config/common.mk b/config/common.mk
index 41840a2..b61fec2 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -231,3 +231,5 @@
 # Certification
 $(call inherit-product-if-exists, vendor/certification/config.mk)
 
+# Inline Signing
+$(call inherit-product-if-exists, vendor/bliss-priv/keys/keys.mk)