Sepolicy load: use -N flag to skip neverallow checks

Fixes issue where attributes used exclusively in neverallow
rules were removed from policy.

Bug: 37357742
Test: Force on-device compile by removing precompiled policy.
      Verify no increase in compile time.

Change-Id: I0d145fd311c2ddcb226a827f2a997f10c20a8379
diff --git a/init/init.cpp b/init/init.cpp
index a75ced5..9cdbd19 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -850,7 +850,7 @@
     const char* compile_args[] = {
         "/system/bin/secilc",
         plat_policy_cil_file,
-        "-M", "true", "-G",
+        "-M", "true", "-G", "-N",
         // Target the highest policy language version supported by the kernel
         "-c", std::to_string(max_policy_version).c_str(),
         mapping_file.c_str(),