[WebAssembly] Add immediate fields to call_indirect and memory operators.

call_indirect, grow_memory, and current_memory now have immediate
operands in the 0xd binary encoding.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285085 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed