[gn build] Port 9bf3e61

Author: llvmgnsyncbot

llvm/utils/gn/secondary/lldb/source/Plugins/Process/Linux/BUILD.gn

@@ -25,6 +25,7 @@ static_library("Linux") {
     "NativeRegisterContextLinux.cpp",
     "NativeRegisterContextLinux_arm.cpp",
     "NativeRegisterContextLinux_arm64.cpp",
+    "NativeRegisterContextLinux_arm64dbreg.cpp",
     "NativeRegisterContextLinux_loongarch64.cpp",
     "NativeRegisterContextLinux_ppc64le.cpp",
     "NativeRegisterContextLinux_riscv64.cpp",