[WebAssembly] Fix getSymbolValue() for data symbols

This is mostly a fix for the output of `llvm-nm`

See Bug 34392: https://bugs.llvm.org//show_bug.cgi?id=34392

Differential Revision: https://reviews.llvm.org/D37359

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312294 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed