message: [OpenMP] Remove extra warning when we build
  Summary:
  This one line change is to remove this warning message
  "warning: integer conversion resulted in a change of sign"
  Reviewers: grokos
  Subscribers: openmp-commits
  Tags: #openmp
diff: // implement
  #if OMPTARGET_NVPTX_DEBUG
  -#define DON(_flag) ((OMPTARGET_NVPTX_DEBUG) & (_flag))
  +#define DON(_flag) ((unsigned)(OMPTARGET_NVPTX_DEBUG) & (_flag))
  #define PRINT0(_flag, _str) \
  { \
  