[gn build] Port 66037b8

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/Target/AArch64/BUILD.gn

@@ -101,6 +101,7 @@ static_library("LLVMAArch64CodeGen") {
     "AArch64LegalizerInfo.cpp",
     "AArch64LoadStoreOptimizer.cpp",
     "AArch64MCInstLower.cpp",
+    "AArch64MachineFunctionInfo.cpp",
     "AArch64MacroFusion.cpp",
     "AArch64PBQPRegAlloc.cpp",
     "AArch64PreLegalizerCombiner.cpp",