message: Fix the compile RUN line in x86-64-ymm-write.test
  Optimistically assuming this was the result of the darwin failure too,
  so removing the XFAIL there.
diff: -# XFAIL: system-darwin
  # XFAIL: system-windows
  # REQUIRES: native && target-x86_64 && native-cpu-avx
  -# RUN: %clangxx %p/Inputs/x86-ymm-read.cpp -o %t
  +# RUN: %clangxx %p/Inputs/x86-ymm-write.cpp -o %t
  # RUN: %lldb -b -s %s %t | FileCheck %s
  process launch
  