[WebAssembly] Fixed disassembler unit test failure.

Summary: A recent commit forgot to update the unit tests.

Differential Revision: https://reviews.llvm.org/D48304

Patch by Wouter Van Oortmerssen

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334999 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed