Merge pull request #78668 from tbkka/tbkka-missing-include

[Gardening] Include Runtime/Config.h directly

Author: tbkka

lib/Immediate/Immediate.cpp

@@ -30,6 +30,7 @@
 #include "swift/Basic/LLVM.h"
 #include "swift/Frontend/Frontend.h"
 #include "swift/IRGen/IRGenPublic.h"
+#include "swift/Runtime/Config.h"
 #include "swift/SILOptimizer/PassManager/Passes.h"
 #include "swift/Subsystems.h"
 #include "llvm/ADT/SmallString.h"