mips] XFAIL wcsncpy.cc test.
The stack unwinder fails to unwind the stack past the interceptor stack
frame, resulting in a test failure. XFAIL this for now.
// RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -o %t && not %run %t >%t.out 2>&1
// RUN: FileCheck %s < %t.out && FileCheck %s < %t.out
+// XFAIL: mips
+
#include <assert.h>
#include <wchar.h>
