yanglint UPDATE use installed search dir if not local build

Author: michalvasko

tools/lint/main.c

@@ -63,8 +63,8 @@ main(int argc, char *argv[])
     search_dir = getenv("YANGLINT_INTERNAL_MODULES_DIR");
     if (!search_dir) {
         search_dir = ly_yang_module_dir();
-        if (access(search_dir, F_OK)) {
-            /* assume running in local build */
+        if (access(search_dir, F_OK) && !access("../modules", F_OK)) {
+            /* running in local build */
             search_dir = "../modules";
         }
     }

tools/lint/main_ni.c

@@ -887,8 +887,8 @@ process_args(int argc, char *argv[], struct yl_opt *yo, struct ly_ctx **ctx)
     search_path = getenv("YANGLINT_INTERNAL_MODULES_DIR");
     if (!search_path) {
         search_path = ly_yang_module_dir();
-        if (access(search_path, F_OK)) {
-            /* assume running in local build */
+        if (access(search_path, F_OK) && !access("../modules", F_OK)) {
+            /* running in local build */
             search_path = "../modules";
         }
     }