[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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331005 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed