always end a section with \n on elf.

llvm-svn: 78534
diff --git a/llvm/lib/MC/MCSection.cpp b/llvm/lib/MC/MCSection.cpp
index 80a80e7..65e86d3 100644
--- a/llvm/lib/MC/MCSection.cpp
+++ b/llvm/lib/MC/MCSection.cpp
@@ -107,6 +107,8 @@
       OS << ",16";
     }
   }
+  
+  OS << '\n';
 }
 
 //===----------------------------------------------------------------------===//