Windows: restore gcc runtime DLLs to copy list (from WinLibs, not bundle)

Author: pepc84

mode/CppMode.jar

@@ -653,7 +653,7 @@ private boolean windowsLibsNowPresent(java.util.List<String> searchDirs, String[
   }
 
   private void checkWindowsDLLs(RunnerListener listener, File binary) throws Exception {
-    String[] allDlls = { "glfw3.dll", "glew32.dll" };
+    String[] allDlls = { "glfw3.dll", "glew32.dll", "libgcc_s_seh-1.dll", "libssp-0.dll", "libwinpthread-1.dll" };
     String[] required = { "glfw3.dll", "glew32.dll" };
 
     // Bundled DLLs are in libs/windows-x64 -- copy them next to the binary