App: add permissions to read symlinks from dalvik cache.

Bug: 18035729
Change-Id: Ib60f9cd59a7a185ae99761ad29358a735ae2ad26

app.te

@@ -142,6 +142,7 @@ allow appdomain usbaccessory_device:chr_file { read write getattr };
 
 # For art.
 allow appdomain dalvikcache_data_file:file execute;
+allow appdomain dalvikcache_data_file:lnk_file r_file_perms;
 
 # /data/dalvik-cache/profiles
 allow appdomain dalvikcache_profiles_data_file:dir { search getattr };