Add linux debian package for mtk platform.

Change-Id: I04c6e9d52ef8d73ffa6c11c342f503aa36d92738
diff --git a/excelsior.xml b/excelsior.xml
index 8daa653..0c12e5d 100644
--- a/excelsior.xml
+++ b/excelsior.xml
@@ -48,6 +48,8 @@
       name="excelsior-mendel/packages/lk-bootloader" />
     <project remote="excelsior" path="packages/trustzone"
       name="excelsior-mendel/packages/trustzone" />
+    <project remote="excelsior" path="packages/linux-mtk"
+      name="excelsior-mendel/packages/linux-mtk" />
     <!-- END mtk packages repos -->
 
     <!-- END Excelsior specfic repos -->