ELF: Add support for the exclude section bit for gas compat.

llvm-svn: 190769
diff --git a/llvm/lib/MC/MCSectionELF.cpp b/llvm/lib/MC/MCSectionELF.cpp
index bf1a984..ff9c4d3 100644
--- a/llvm/lib/MC/MCSectionELF.cpp
+++ b/llvm/lib/MC/MCSectionELF.cpp
@@ -75,6 +75,8 @@
       OS << ",#execinstr";
     if (Flags & ELF::SHF_WRITE)
       OS << ",#write";
+    if (Flags & ELF::SHF_EXCLUDE)
+      OS << ",#exclude";
     if (Flags & ELF::SHF_TLS)
       OS << ",#tls";
     OS << '\n';
@@ -84,6 +86,8 @@
   OS << ",\"";
   if (Flags & ELF::SHF_ALLOC)
     OS << 'a';
+  if (Flags & ELF::SHF_EXCLUDE)
+    OS << 'e';
   if (Flags & ELF::SHF_EXECINSTR)
     OS << 'x';
   if (Flags & ELF::SHF_GROUP)