Fix error for some non-GKI kernel source code (#45)

Idea from @Dreamail

kernel/selinux/sepolicy.h

@@ -1,6 +1,7 @@
 #ifndef __KSU_H_SEPOLICY
 #define __KSU_H_SEPOLICY
 
+#include <linux/types.h>
 #include <ss/sidtab.h>
 #include <ss/services.h>
 #include <objsec.h>
@@ -60,4 +61,4 @@ void add_typeattribute_raw(struct policydb* db, struct type_datum *type, struct
 
 bool add_typeattribute(struct policydb* db, const char *type, const char *attr);
 
-#endif
+#endif