[clang][Interpreter] Disable part of lambda test on Windows

llvm#143547 for details.

For some reason the order of the printf output is not as expected
when piped. None of the "fixes" I have are good, so only run this
RUN on non-Windows.

Test added by llvm#127467.

Author: DavidSpickett

clang/test/Interpreter/lambda.cpp

@@ -1,7 +1,9 @@
 // REQUIRES: host-supports-jit
 // UNSUPPORTED: system-aix
 // RUN: cat %s | clang-repl | FileCheck %s
-// RUN: cat %s | clang-repl -Xcc -Xclang -Xcc -verify -Xcc -O2 | FileCheck %s
+// At -O2, somehow "x = 42" appears first when piped into FileCheck,
+// see https://github.com/llvm/llvm-project/issues/143547.
+// RUN: %if !system-windows %{ cat %s | clang-repl -Xcc -Xclang -Xcc -verify -Xcc -O2 | FileCheck %s %}
 
 extern "C" int printf(const char *, ...);