build: add additional attributes to Win installer

share/setup.nsi.in

@@ -58,8 +58,8 @@ VIAddVersionKey ProductVersion "@PACKAGE_VERSION@"
 VIAddVersionKey CompanyName "${COMPANY}"
 VIAddVersionKey CompanyWebsite "${URL}"
 VIAddVersionKey FileVersion "@PACKAGE_VERSION@"
-VIAddVersionKey FileDescription ""
-VIAddVersionKey LegalCopyright ""
+VIAddVersionKey FileDescription "Installer for @PACKAGE_NAME@"
+VIAddVersionKey LegalCopyright "Copyright (C) 2009-@COPYRIGHT_YEAR@ @COPYRIGHT_HOLDERS_FINAL@"
 InstallDirRegKey HKCU "${REGKEY}" Path
 ShowUninstDetails show