Add search in bpf directory for bpfdomains

Bug: 203462310
Test: Ensure that associated BPFs can be loaded
Change-Id: I317a890abb518cf4ac47cd089e882315434342ce
diff --git a/private/bpfdomain.te b/private/bpfdomain.te
index f0888a7..2be7f88 100644
--- a/private/bpfdomain.te
+++ b/private/bpfdomain.te
@@ -11,3 +11,4 @@
 # any domain which uses bpf is a bpfdomain
 neverallow { domain -bpfdomain } *:bpf *;
 
+allow bpfdomain fs_bpf:dir search;