Fix EhFrameTest.Alignment unit test on ARM.

test/unittests/eh-frame-writer-unittest.cc

Index: test/unittests/eh-frame-writer-unittest.cc
diff --git a/test/unittests/eh-frame-writer-unittest.cc b/test/unittests/eh-frame-writer-unittest.cc
index 24eeca45aa35a29b5bf937050dc5e1d9a3ccaf34..98503986aa708e9a277fdfde0992710efa5d9dcc 100644
--- a/test/unittests/eh-frame-writer-unittest.cc
+++ b/test/unittests/eh-frame-writer-unittest.cc
@@ -42,7 +42,7 @@ TEST_F(EhFrameWriterTest, Alignment) {
   ASSERT_EQ(0, EhFrameConstants::kEhFrameTerminatorSize % 4);
   EXPECT_EQ(0, (iterator.GetBufferSize() - EhFrameConstants::kEhFrameHdrSize -
                 EhFrameConstants::kEhFrameTerminatorSize) %
-                   8);
+                   kPointerSize);
 }
 
 TEST_F(EhFrameWriterTest, FDEHeader) {