[gn build] Port c0fdc74

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/ExecutionEngine/Orc/Shared/BUILD.gn

@@ -2,6 +2,7 @@ static_library("Shared") {
   output_name = "LLVMOrcShared"
   deps = [ "//llvm/lib/Support" ]
   sources = [
+    "AllocationActions.cpp",
     "OrcError.cpp",
     "OrcRTBridge.cpp",
     "SimpleRemoteEPCUtils.cpp",