[gn build] Port ea2da57

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/Transforms/Coroutines/BUILD.gn

@@ -18,5 +18,6 @@ static_library("Coroutines") {
     "CoroFrame.cpp",
     "CoroSplit.cpp",
     "Coroutines.cpp",
+    "SuspendCrossingInfo.cpp",
   ]
 }