fix: appimage search path

Author: Dax89

src/main.cpp

@@ -41,7 +41,7 @@ void configure_searchpaths() {
         const QString APP_DIR = QString::fromUtf8(appimage_dir);
 
 #if defined(REDASM_PLUGIN_DIR)
-        append_unique(utils::search_paths, QString::fromUtf8(REDASM_PLUGIN_DIR));
+        append_unique(utils::search_paths, APP_DIR + QString::fromUtf8(REDASM_PLUGIN_DIR));
 #endif
 
         append_unique(utils::kb_search_paths, (APP_DIR + "/usr/share/redasm/kb").toUtf8());