implement redbend flashing

Change-Id: Icad93103ed2321ad8b6aecbbf2e0f2f8fe139c0f
diff --git a/bmlutils/Android.mk b/bmlutils/Android.mk
index f1a8525..38da88c 100644
--- a/bmlutils/Android.mk
+++ b/bmlutils/Android.mk
@@ -3,6 +3,7 @@
 LOCAL_PATH := $(call my-dir)
 
 include $(CLEAR_VARS)
+LOCAL_CFLAGS += -DBOARD_BOOT_DEVICE=\"$(BOARD_BOOT_DEVICE)\"
 LOCAL_SRC_FILES := bmlutils.c
 LOCAL_MODULE := libbmlutils
 include $(BUILD_STATIC_LIBRARY)