bugpoint/ToolRunner.cpp: ProcessFailure(): Close ErrorFD immediately, or it couldn't be reopened on Win32.

FIXME: We may have an option in openFileForWrite(), not to use ResultFD but to close it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212902 91177308-0d34-0410-b5e6-96231b3b80d8