allow overriding mke2fs and htcbatt

Change-Id: Ibff628238c39661874e1e55bfcf6d51516b6bdd5
diff --git a/utilities/Android.mk b/utilities/Android.mk
index badd25e..fb2e098 100755
--- a/utilities/Android.mk
+++ b/utilities/Android.mk
@@ -48,7 +48,11 @@
 LOCAL_MODULE_TAGS := eng
 LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES
 LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin
+ifeq ($(BOARD_MKE2FS),)
 LOCAL_SRC_FILES := $(LOCAL_MODULE)
+else
+LOCAL_SRC_FILES := ../../../$(BOARD_MKE2FS)
+endif
 include $(BUILD_PREBUILT)
 endif
 
@@ -90,7 +94,11 @@
 LOCAL_MODULE_TAGS := eng
 LOCAL_MODULE_CLASS := RECOVERY_EXECUTABLES
 LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin
+ifeq ($(BOARD_HTCBATT),)
 LOCAL_SRC_FILES := $(LOCAL_MODULE)
+else
+LOCAL_SRC_FILES := ../../../$(BOARD_HTCBATT)
+endif
 include $(BUILD_PREBUILT)
 endif