[WebAssembly] Section symbols must have local binding

Summary: Also test for symbols information in test/MC/WebAssembly/debug-info.ll.

Subscribers: jfb, dschuff, jgravelle-google, aheejin, sunfish, JDevlieghere, llvm-commits

Differential Revision: https://reviews.llvm.org/D46160

llvm-svn: 331005
diff --git a/llvm/lib/MC/WasmObjectWriter.cpp b/llvm/lib/MC/WasmObjectWriter.cpp
index 88bd046..05fc336 100644
--- a/llvm/lib/MC/WasmObjectWriter.cpp
+++ b/llvm/lib/MC/WasmObjectWriter.cpp
@@ -1220,7 +1220,7 @@
     wasm::WasmSymbolInfo Info;
     Info.Name = SectionSym->getName();
     Info.Kind = wasm::WASM_SYMBOL_TYPE_SECTION;
-    Info.Flags = 0;
+    Info.Flags = wasm::WASM_SYMBOL_BINDING_LOCAL;
     Info.ElementIndex = ElementIndex;
     SymbolIndices[SectionSym] = SymbolInfos.size();
     SymbolInfos.emplace_back(Info);