configure: don't try to use Win32 make on release branch

Change-Id: Icd8c1b45659ca323aef25a55803f5b1ce078b9d3
Reviewed-on: https://gerrit.libreoffice.org/10932
Reviewed-by: Thomas Arnhold <thomas@arnhold.org>
Tested-by: Thomas Arnhold <thomas@arnhold.org>