[lldb] Disable x86-multithread-write.test with reproducers

This test is failing on GreenDragon. Disabling it until I have bandwidth
to investigate why the register values are different during replay.

GitOrigin-RevId: 876e7714dc73e651c5841af1b38b54fa350b6331
diff --git a/test/Shell/Register/x86-multithread-write.test b/test/Shell/Register/x86-multithread-write.test
index cc02b32..30273a6 100644
--- a/test/Shell/Register/x86-multithread-write.test
+++ b/test/Shell/Register/x86-multithread-write.test
@@ -1,6 +1,7 @@
 # XFAIL: system-windows
 # REQUIRES: native && (target-x86 || target-x86_64)
 # UNSUPPORTED: system-debugserver
+# UNSUPPORTED: lldb-repro
 # RUN: %clangxx_host %p/Inputs/x86-multithread-write.cpp -o %t -pthread
 # RUN: %lldb -b -s %s %t | FileCheck %s