Merge topic 'qcc-8-cxx-lang-flag'

ea3280f15b Merge branch 'qcc-8-cxx-lang-flag-3.31' into qcc-8-cxx-lang-flag
166061629a QCC-CXX: use `-x c++` on 8+
dc7adb64f3 QCC-CXX: use `-x c++` on 8+

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !10992