Fix bootloader version computing

Use hex base to compute minor incrementation

Bug: 17381829

Change-Id: I0c0d6c5c526a950e78db8d4df9ac140eb5342dc5
Signed-off-by: Sylvain Chouleur <[email protected]>
diff --git a/Android.mk b/Android.mk
index 29252eb..539c7e1 100644
--- a/Android.mk
+++ b/Android.mk
@@ -105,6 +105,6 @@
 	$(hide) cat $(bootstub_aosp_bin) /dev/zero | dd bs=$(BOOTSTUB_SIZE) count=1 > $@
 	export bl_version=`tail -n 1 $(BL_VERSION_FILE) | cut -d- -f2`; \
 	export maj=`echo $$bl_version | cut -d. -f1`; export min=`echo $$bl_version | cut -d. -f2`; \
-	echo -en \\x$$maj\\x$$((min+1)) | dd of=$@ seek=$$(($(BOOTSTUB_SIZE)-2)) bs=1
+	echo -en `printf "\\\\\x%x\\\\\x%x" $$maj $$((10#$$min+1))` | dd of=$@ seek=$$(($(BOOTSTUB_SIZE)-2)) bs=1
 
 endif #($(TARGET_BOARD_PLATFORM),moorefield)