Merge topic 'nmake-utf8'

f3f57cc4ed NMake: Use UTF-8 with BOM if supported by nmake
186c9bff53 NMake: Check nmake version for support of UTF-8
8a4f536be6 NMake: Detect nmake version

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !6041