Move <string> include to ImportedFunctionsInliningStatistics.cpp and add missing <memory> include as we have explicit uses of std::unique_ptr in the header.
This reverts commit d97f776be5.
The original problem was due to build failures in shared lib builds. D95079
moved ImportedFunctionsInliningStatistics under Analysis, unblocking
this.
This is related to D94982. We want to call these APIs from the Analysis
component, so we can't leave them under Transforms.
Differential Revision: https://reviews.llvm.org/D95079
Simon Pilgrim