CMake: allow user specified boolean values to have any case

When running something like this:

    cmake -D FEATURE_xkbcommon=On qtbase

one would run into issues like:

    CMake Error at cmake/QtFeature.cmake:254 (message):
      Sanity check failed: FEATURE_xkbcommon has invalid value "On"!
    Call Stack (most recent call first):
      cmake/QtFeature.cmake:396 (qt_feature_check_and_save_user_provided_value)
      cmake/QtFeature.cmake:606 (qt_evaluate_feature)
      cmake/QtFeature.cmake:575 (qt_feature_module_end)
      src/CMakeLists.txt:12 (qt_feature_evaluate_features)

Change-Id: I33a921625b97aeb3c423cb7c1fb1bd3b05ce24a7
Pick-to: 6.4 6.3 6.2
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

0 files changed, 0 insertions, 0 deletions