<rdar://problem/14182286>

Made sure that temporary object created from HarmonizeThreadIdsForProfileData() doesn’t get passed around without creating an object first.

Reviewed by Greg

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@184769 91177308-0d34-0410-b5e6-96231b3b80d8