[gn build] Port a53b306

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/ProfileData/BUILD.gn

@@ -18,6 +18,7 @@ static_library("ProfileData") {
     "InstrProfWriter.cpp",
     "ItaniumManglingCanonicalizer.cpp",
     "MemProf.cpp",
+    "MemProfRadixTree.cpp",
     "MemProfReader.cpp",
     "PGOCtxProfReader.cpp",
     "PGOCtxProfWriter.cpp",