Set LLDB_ENABLE_LIBXML2 NO in Windows-x86_64 CMake cache

Author: z2oh

cmake/caches/Windows-x86_64.cmake

@@ -72,6 +72,7 @@ set(LLDB_ALLOW_STATIC_BINDINGS YES CACHE BOOL "")
 set(LLDB_USE_STATIC_BINDINGS YES CACHE BOOL "")
 set(LLDB_ENABLE_PYTHON YES CACHE BOOL "")
 set(LLDB_EMBED_PYTHON_HOME NO CACHE BOOL "")
+set(LLDB_ENABLE_LIBXML2 NO CACHE BOOL "")
 
 # This requires perl which may not be available on Windows
 set(SWIFT_INCLUDE_DOCS NO CACHE BOOL "")