Support for ext2 and ext3 update-binary.

Change-Id: Ide34392bd8ac56878aa3e992b275a39d6b6bc7cf
diff --git a/mmcutils/mmcutils.h b/mmcutils/mmcutils.h
index 64e5813..5b10fdc 100644
--- a/mmcutils/mmcutils.h
+++ b/mmcutils/mmcutils.h
@@ -83,6 +83,9 @@
 int mmc_raw_read (const MmcPartition *partition, char *data, int data_size);
 int mmc_raw_write (const MmcPartition *partition, char *data, int data_size);
 
+int format_ext2_device(const char *device);
+int format_ext3_device(const char *device);
+
 #endif  // MMCUTILS_H_