Merge pull request #7556 from apple/jdevlieghere/cherrypick/71173d2900065afab8b31473701c7c51ba8d8282

[lldb] Remove XFAIL from xmm/ymm-related tests

Author: JDevlieghere

lldb/test/Shell/Register/x86-64-write.test

@@ -1,9 +1,3 @@
-# xfail with system debugserver until the fix for
-# https://reviews.llvm.org/D123269 in
-# lldb/tools/debugserver/source/MacOSX/x86_64/DNBArchImplX86_64.cpp
-# has made it into released tools.
-# XFAIL: system-debugserver
-
 # XFAIL: system-windows
 # REQUIRES: native && target-x86_64
 # RUN: %clangxx_host %p/Inputs/x86-64-write.cpp -o %t