MC: Fix the MCNullStreamer which was broken in r147763.

llvm-svn: 151213
diff --git a/llvm/test/CodeGen/X86/null-streamer.ll b/llvm/test/CodeGen/X86/null-streamer.ll
new file mode 100644
index 0000000..7c0e82f
--- /dev/null
+++ b/llvm/test/CodeGen/X86/null-streamer.ll
@@ -0,0 +1,11 @@
+; Check the MCNullStreamer operates correctly, at least on a minimal test case.
+;
+; RUN: llc -filetype=null -o %t -march=x86 %s
+
+define void @f0()  {
+  ret void
+}
+
+define void @f1() {
+  ret void
+}