[X86] Don't set i64 ADDC/ADDE/SUBC/SUBE as Custom if the target isn't 64-bit....

[X86] Don't set i64 ADDC/ADDE/SUBC/SUBE as Custom if the target isn't 64-bit. This way we don't have to catch them and do nothing with them in ReplaceNodeResults.

llvm-svn: 283066