MASM doesn't have one of these.

llvm-svn: 28190
diff --git a/llvm/lib/Target/X86/X86IntelAsmPrinter.cpp b/llvm/lib/Target/X86/X86IntelAsmPrinter.cpp
index 0081ba8..74643c2 100755
--- a/llvm/lib/Target/X86/X86IntelAsmPrinter.cpp
+++ b/llvm/lib/Target/X86/X86IntelAsmPrinter.cpp
@@ -305,6 +305,7 @@
   
   DefaultTextSection = "_text";
   DefaultDataSection = "_data";
+  SwitchToSectionDirective = "";
 
   O << "\t.686\n\t.model flat\n\n";