libsepol: Export the cil_write_post_ast function

Signed-off-by: James Carter <jwcart2@gmail.com>
Reviewed-by: Daniel Burgener <dburgener@linux.microsoft.com>
Acked-by: Petr Lautrbach <lautrbach@redhat.com>

libsepol/src/libsepol.map.in

@@ -289,3 +289,8 @@ LIBSEPOL_3.4 {
 	sepol_string_to_security_class;
 	sepol_validate_transition_reason_buffer;
 } LIBSEPOL_3.0;
+
+LIBSEPOL_3.5 {
+  global:
+	cil_write_post_ast;
+} LIBSEPOL_3.4;