[WebAssembly] Update test cases after FixFunctionBitcasts

Summary:
This updates generated binaries and corresponding test cases up to date
after applying FixFunctionBitcasts pass.

Reviewers: sbc100

Subscribers: dschuff, jgravelle-google, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D54070

llvm-svn: 346286