Disable jit_memory_region_test tests on buggy kernels.

Test: jit_memory_region_test
Change-Id: I5339071ab1fcb9765a91015e33024d05774ac2b1
diff --git a/libartbase/base/utils.h b/libartbase/base/utils.h
index f434cb4..ba95331 100644
--- a/libartbase/base/utils.h
+++ b/libartbase/base/utils.h
@@ -116,6 +116,9 @@
 // Flush CPU caches. Returns true on success, false if flush failed.
 WARN_UNUSED bool FlushCpuCaches(void* begin, void* end);
 
+// On some old kernels, a cache operation may segfault.
+WARN_UNUSED bool CacheOperationsMaySegFault();
+
 template <typename T>
 constexpr PointerSize ConvertToPointerSize(T any) {
   if (any == 4 || any == 8) {