Merge pull request swiftlang#12368 from gregomni/callee

[Sema] Some cleanup of CSDiag by splitting off the CalleeCandidateInfo class

Author: gregomni

lib/Sema/CMakeLists.txt

@@ -12,6 +12,7 @@ add_swift_library(swiftSema STATIC
   CSRanking.cpp
   CSSimplify.cpp
   CSSolver.cpp
+  CalleeCandidateInfo.cpp
   CodeSynthesis.cpp
   Constraint.cpp
   ConstraintGraph.cpp