Change path to Bluetooth stack

Change-Id: I8456f03dbcc6e4f9b353b9d9bfd67c10826421fb
diff --git a/libbt-vendor/Android.mk b/libbt-vendor/Android.mk
index ff35ddc..f31fdd4 100644
--- a/libbt-vendor/Android.mk
+++ b/libbt-vendor/Android.mk
@@ -2,7 +2,7 @@
 
 include $(CLEAR_VARS)
 
-BDROID_DIR := $(TOP_DIR)external/bluetooth/bluedroid
+BDROID_DIR := $(TOP_DIR)system/bt
 
 LOCAL_SRC_FILES := \
         bt_vendor_mrvl.c \