Lookup modules.symbols.bin

Test in my system:

./test/test-lookup symbol:sas_slave_destroy
libkmod version 0.1
Alias: 'symbol:sas_slave_destroy'
Modules matching:
	libsas
diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
index 7450ee3..fdfcf45 100644
--- a/libkmod/libkmod-module.c
+++ b/libkmod/libkmod-module.c
@@ -180,6 +180,8 @@
 	err = kmod_lookup_alias_from_config(ctx, alias, list);
 	CHECK_ERR_AND_FINISH(err, fail, list, finish);
 
+	err = kmod_lookup_alias_from_symbols_file(ctx, alias, list);
+	CHECK_ERR_AND_FINISH(err, fail, list, finish);
 
 finish: