vold2: Initial support for Android Secure External Caches

Signed-off-by: San Mehat <san@google.com>
diff --git a/Android.mk b/Android.mk
index b9e63c7..9802c9e 100644
--- a/Android.mk
+++ b/Android.mk
@@ -22,7 +22,8 @@
                   logwrapper.c                         \
                   ProcessKiller.c                      \
                   geom_mbr_enc.c                       \
-                  Fat.cpp
+                  Fat.cpp                              \
+                  Loop.cpp
 
 LOCAL_MODULE:= vold