MemoryBufferTest.cpp: Tweak offset corresponding to the case that PageSize is greater than 8000.

PageSize, aka AllocationGranularity, is 65536 on Win32 (and Cygwin).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188999 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/Support/MemoryBufferTest.cpp

@@ -128,7 +128,7 @@ void MemoryBufferTest::testGetOpenFileSlice(bool Reopen) {
   OwningBuffer Buf;
   error_code EC = MemoryBuffer::getOpenFileSlice(TestFD, TestPath.c_str(), Buf,
                                                  40000, // Size
-                                                 8000   // Offset
+                                                 80000  // Offset
                                                  );
   EXPECT_FALSE(EC);