[clang-repl] XFAIL riscv targets in simple-exception test case

This test fails for RISC-V and Arm targets are already XFAILed, so add
RISC-V to the XFAIL list.

Differential Revision: https://reviews.llvm.org/D141380

Author: asb

clang/test/Interpreter/simple-exception.cpp

@@ -1,7 +1,7 @@
 // clang-format off
 // UNSUPPORTED: system-aix
-// XFAIL for arm and arm64, or running on Windows.
-// XFAIL: target=arm{{.*}}, system-windows
+// XFAIL for arm, arm64, riscv, or running on Windows.
+// XFAIL: target={{(arm|riscv).*}}, system-windows
 // RUN: cat %s | clang-repl | FileCheck %s
 extern "C" int printf(const char *, ...);
 
@@ -11,4 +11,4 @@ auto r1 = checkException();
 // CHECK: Running f()
 // CHECK-NEXT: Simple exception
 
-%quit
+%quit