cm: remove tmp file on boot

Change-Id: I5bf329663e675fa98e8e269a67b56fc28d37591e
diff --git a/prebuilt/common/etc/init.d/06mountdl b/prebuilt/common/etc/init.d/06mountdl
index bed7019..748171f 100755
--- a/prebuilt/common/etc/init.d/06mountdl
+++ b/prebuilt/common/etc/init.d/06mountdl
@@ -10,4 +10,6 @@
   mount -o bind /data/local/download /cache/download
 fi
 
+rm /cache/download/downloadfile*.apk
+
 exit 0