Revert "[IRBuilder] Fold consistently for or/and whether constant is LHS or RHS"

This reverts commit r365260 which broke the following tests:

    Clang :: CodeGenCXX/cfi-mfcall.cpp
    Clang :: CodeGenObjC/ubsan-nullability.m
    LLVM :: Transforms/LoopVectorize/AArch64/pr36032.ll

llvm-svn: 365284