[VFS] Fix warning and use better check.

llvm-svn: 352527
diff --git a/llvm/unittests/Support/VirtualFileSystemTest.cpp b/llvm/unittests/Support/VirtualFileSystemTest.cpp
index f6cbd5b..fc39f50 100644
--- a/llvm/unittests/Support/VirtualFileSystemTest.cpp
+++ b/llvm/unittests/Support/VirtualFileSystemTest.cpp
@@ -776,7 +776,7 @@
 
   bool Local = true;
   ASSERT_FALSE(PFS.isLocal("/a", Local));
-  ASSERT_EQ(false, Local);
+  EXPECT_FALSE(Local);
 }
 
 class InMemoryFileSystemTest : public ::testing::Test {