Allow execute on mounted ASEC and OBB containers

This allows us to place shared libraries in these containers which may
only be loaded if they are executable.

Change-Id: I78fa9ab6d5c58ec8b98c40004da72aebc0aade2a
diff --git a/Volume.cpp b/Volume.cpp
index f945b15..190b64b 100644
--- a/Volume.cpp
+++ b/Volume.cpp
@@ -323,7 +323,8 @@
          * muck with it before exposing it to non priviledged users.
          */
         errno = 0;
-        if (Fat::doMount(devicePath, "/mnt/secure/staging", false, false, 1000, 1015, 0702, true)) {
+        if (Fat::doMount(devicePath, "/mnt/secure/staging", false, false, false,
+                1000, 1015, 0702, true)) {
             SLOGE("%s failed to mount via VFAT (%s)\n", devicePath, strerror(errno));
             continue;
         }