Allow zygote to search tmpfs.

Change-Id: Ib0bdcbc1a7e45e1d1a046c9fa8aff89183ebfe0d

zygote.te

@@ -35,5 +35,5 @@ allow zygote rootfs:file r_file_perms;
 allow zygote rootfs:dir mounton;
 allow zygote sdcard_type:dir { write search setattr create add_name mounton };
 dontaudit zygote self:capability fsetid;
-allow zygote tmpfs:dir { write create add_name setattr mounton };
+allow zygote tmpfs:dir { write create add_name setattr mounton search };
 allow zygote tmpfs:filesystem mount;