parser CHANGE import statement

create new function lyp_check_import, which is used in YIN and YANG parser
diff --git a/src/parser.h b/src/parser.h
index 0d06d91..b66c9a7 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -105,6 +105,8 @@
 int lyp_check_include(struct lys_module *module, struct lys_submodule *submodule, const char *value,
                       int line, struct lys_include *inc, struct unres_schema *unres);
 
+int lyp_check_import(struct lys_module *module, const char *value, int line, struct lys_import *imp);
+
 /**
  * @brief Propagate imports and includes into the main module
  *