[InlineCost] Set LastCallToStaticBonus in ML inlining models.

This patch set LastCallToStaticBonus based on check, it has
no noticeable size reduction on an internal workload and linux kernel
with Os/Oz.

Differential Revision: https://reviews.llvm.org/D124233

llvm/lib/Analysis/InlineCost.cpp

@@ -1203,6 +1203,10 @@ private:
     set(InlineCostFeatureIndex::ColdCcPenalty,
         (F.getCallingConv() == CallingConv::Cold));
 
+    set(InlineCostFeatureIndex::LastCallToStaticBonus,
+        (F.hasLocalLinkage() && F.hasOneLiveUse() &&
+         &F == CandidateCall.getCalledFunction()));
+
     // FIXME: we shouldn't repeat this logic in both the Features and Cost
     // analyzer - instead, we should abstract it to a common method in the
     // CallAnalyzer