browseui: Add a stub for DllInstall.

dlls/browseui/browseui.spec

 @ stdcall -private DllCanUnloadNow()
 @ stdcall -private DllGetClassObject(ptr ptr ptr)
 @ stdcall -private DllGetVersion(ptr)
-@ stub DllInstall
+@ stdcall -private DllInstall(long wstr)
 @ stdcall -private DllRegisterServer()
 @ stdcall -private DllUnregisterServer()

dlls/browseui/browseui_main.c

@@ -212,3 +212,12 @@ HRESULT WINAPI DllGetClassObject(REFCLSID clsid, REFIID iid, LPVOID *ppvOut)
     FIXME("CLSID %s not supported\n", debugstr_guid(clsid));
     return CLASS_E_CLASSNOTAVAILABLE;
 }
+
+/***********************************************************************
+ *  DllInstall (BROWSEUI.@)
+ */
+HRESULT WINAPI DllInstall(BOOL bInstall, LPCWSTR cmdline)
+{
+    FIXME("(%s, %s): stub\n", bInstall ? "TRUE" : "FALSE", debugstr_w(cmdline));
+    return S_OK;
+}