Use system/bt/hci/include

* Unless we're going to use the complete BT stack from CAF, we
  can't use their commonsys includes, so use the normal
  system/bt/hci/include instead

Change-Id: I446ac13b0813c884b42d6a4c3aefcabd42461927
diff --git a/libbt-vendor/Android.mk b/libbt-vendor/Android.mk
index f15bb04..d5e2c5d 100644
--- a/libbt-vendor/Android.mk
+++ b/libbt-vendor/Android.mk
@@ -45,7 +45,7 @@
 LOCAL_C_INCLUDES += \
         $(LOCAL_PATH)/include \
         external/bluetooth/bluedroid/hci/include \
-        vendor/qcom/opensource/commonsys/system/bt/hci/include \
+        system/bt/hci/include \
         $(TARGET_OUT_HEADERS)/bt/hci_qcomm_init \
         $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include