Move PerformanceInliner.cpp to SILOptimzer/Transforms as it is a function pass

Author: trentxintong

lib/SILOptimizer/IPO/CMakeLists.txt

@@ -8,6 +8,5 @@ set(IPO_SOURCES
   IPO/GlobalOpt.cpp
   IPO/GlobalPropertyOpt.cpp
   IPO/LetPropertiesOpts.cpp
-  IPO/PerformanceInliner.cpp
   IPO/UsePrespecialized.cpp
   PARENT_SCOPE)

lib/SILOptimizer/Transforms/CMakeLists.txt

@@ -12,6 +12,7 @@ set(TRANSFORMS_SOURCES
   Transforms/FunctionSignatureOptRewriter.cpp
   Transforms/GenericSpecializer.cpp
   Transforms/MergeCondFail.cpp
+  Transforms/PerformanceInliner.cpp
   Transforms/RedundantLoadElimination.cpp
   Transforms/RedundantOverflowCheckRemoval.cpp
   Transforms/ReleaseDevirtualizer.cpp