It's a very large constant. Say so.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189899 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/CodeGen/DIEHashTest.cpp b/unittests/CodeGen/DIEHashTest.cpp
index 54dc4ee..dcacdb0 100644
--- a/unittests/CodeGen/DIEHashTest.cpp
+++ b/unittests/CodeGen/DIEHashTest.cpp
@@ -23,7 +23,7 @@
   DIEValue *Size = new DIEInteger(4);
   Die->addValue(dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Size);
   uint64_t MD5Res = Hash.computeTypeSignature(Die);
-  ASSERT_TRUE(MD5Res == 0x540e9ff30ade3e4a);
+  ASSERT_TRUE(MD5Res == 0x540e9ff30ade3e4aULL);
   delete Die;
 }
 }