Revert "Strip file execute permissions from unconfined domains."

I'd like to do more testing to make sure OTA updates aren't broken by this change. Until we do the testing, let's rollback this change.

This reverts commit 5da08810.

Change-Id: I56a7f47a426cfd3487af1029283bd8ce182d5ab2

unconfined.te

@@ -29,10 +29,9 @@ allow unconfineddomain domain:ipc_class_set *;
 allow unconfineddomain domain:key *;
 allow unconfineddomain fs_type:filesystem *;
 allow unconfineddomain {fs_type dev_type file_type}:{ dir blk_file lnk_file sock_file fifo_file } ~relabelto;
-allow unconfineddomain {fs_type -usermodehelper -proc_security}:{ chr_file file } ~{entrypoint execmod execute relabelto};
-allow unconfineddomain {dev_type -kmem_device}:{ chr_file file } ~{entrypoint execmod execute relabelto};
-allow unconfineddomain file_type:{ chr_file file } ~{entrypoint execmod execute relabelto};
-allow unconfineddomain { rootfs system_file exec_type }:file execute;
+allow unconfineddomain {fs_type -usermodehelper -proc_security}:{ chr_file file } ~{entrypoint execmod relabelto};
+allow unconfineddomain {dev_type -kmem_device}:{ chr_file file } ~{entrypoint execmod relabelto};
+allow unconfineddomain file_type:{ chr_file file } ~{entrypoint execmod relabelto};
 allow unconfineddomain node_type:node *;
 allow unconfineddomain node_type:{ tcp_socket udp_socket rawip_socket } node_bind;
 allow unconfineddomain netif_type:netif *;