Fix test/transcoding/dbginfo-bug-on-bool-converts.ll test expectations (#3879)
https://github.com/llvm/llvm-project/pull/209232 fixed the SPIR-V
backend selectIToF to preserve signedness (sitofp i1 true was
miscompiled as 1.0 instead of -1.0), so the select now produces -1
rather than 1
Original commit:
https://github.com/KhronosGroup/SPIRV-LLVM-Translator/commit/9abcbf1d42609e3