[libselinux] add db_language support on label_db.c

[KaiGai Kohei <kaigai@xxxxxxxxxxxxx>]

The attached patch add support db_language object class
to the selabel_lookup(_raw) interfaces.
It is needed to inform object manager initial label of
procedural language object.

Thanks,
-- 
KaiGai Kohei <kaigai@xxxxxxxxxxxxx>

diff --git a/libselinux/include/selinux/label.h b/libselinux/include/selinux/label.h
index 0435365..1a54307 100644
--- a/libselinux/include/selinux/label.h
+++ b/libselinux/include/selinux/label.h
@@ -128,6 +128,7 @@ void selabel_stats(struct selabel_handle *handle);
 #define SELABEL_DB_PROCEDURE	7
 #define SELABEL_DB_BLOB		8
 #define SELABEL_DB_TUPLE	9
+#define SELABEL_DB_LANGUAGE	10
 
 #ifdef __cplusplus
 }
diff --git a/libselinux/src/label_db.c b/libselinux/src/label_db.c
index e1bfab7..7afacf0 100644
--- a/libselinux/src/label_db.c
+++ b/libselinux/src/label_db.c
@@ -138,6 +138,8 @@ process_line(const char *path, char *line_buf, unsigned int line_num,
 		spec->type = SELABEL_DB_BLOB;
 	else if (!strcmp(type, "db_tuple"))
 		spec->type = SELABEL_DB_TUPLE;
+	else if (!strcmp(type, "db_language"))
+		spec->type = SELABEL_DB_LANGUAGE;
 	else {
 		selinux_log(SELINUX_WARNING,
 			    "%s:  line %d has invalid object type %s\n",