Simplify handling of --noexecstack by using getNonexecutableStackSection.

llvm-svn: 219799
diff --git a/llvm/tools/llvm-mc/Disassembler.cpp b/llvm/tools/llvm-mc/Disassembler.cpp
index 9367590..0ff73c5 100644
--- a/llvm/tools/llvm-mc/Disassembler.cpp
+++ b/llvm/tools/llvm-mc/Disassembler.cpp
@@ -185,7 +185,7 @@
   }
 
   // Set up initial section manually here
-  Streamer.InitSections();
+  Streamer.InitSections(false);
 
   bool ErrorOccurred = false;