explorerframe: Add dll stub.
diff --git a/configure.ac b/configure.ac
index bacba41..aac7a82 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2359,6 +2359,7 @@
 WINE_CONFIG_DLL(dxgi,,[dxgi])
 WINE_CONFIG_TEST(dlls/dxgi/tests)
 WINE_CONFIG_LIB(dxguid)
+WINE_CONFIG_DLL(explorerframe)
 WINE_CONFIG_DLL(faultrep)
 WINE_CONFIG_DLL(fltlib)
 WINE_CONFIG_DLL(fusion)