WebAssembly: add vtable test

The test will mainly be useful to check that the .s file assembles and relocates properly because vtables reference functions in their data section.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256102 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed