The Apple buildbots are set up to pass --target to configure for both
cross- and non-cross-compile builds, and the standard autoconf response
to this is to set the program prefix to '<target>-'. Until we can figure
out the proper way to handle this (don't pass --target? pass an explicit
--program-prefix=""? don't auto-populate program_prefix with target_alias?)
it's more important to keep the buildbots running.
This reverts r164633 / ba48ceb1a3.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164651 91177308-0d34-0410-b5e6-96231b3b80d8
85042e6585