lib.platform.loongnix: FIX Makefile not exist

  Debug:
    - the linux-headers didn't support the Arch `loongarch64`, but it
    provide the support of `loongarch`.
    - After the trying to change the linuxArch from `loongarch64` into
    `loongarch` to avoid this error, it case another error which gcc not
    support `--with-arch=loongarch`.
  Action:
    Make a kind of Mapping in linux-headers for `loongarch64` into
    `loongarch`
  With-Bug:
    Gold linker didn't support loongarch64

pkgs/os-specific/linux/kernel-headers/default.nix

@@ -29,13 +29,17 @@ let
     destination = "/include/byteswap.h";
   };
 
+  linuxArchMapping = {
+    "loongarch64" = "loongarch";
+  };
+
   makeLinuxHeaders = { src, version, patches ? [] }: stdenvNoCC.mkDerivation {
     inherit src;
 
     pname = "linux-headers";
     inherit version;
 
-    ARCH = stdenvNoCC.hostPlatform.linuxArch;
+    ARCH = linuxArchMapping."${stdenvNoCC.hostPlatform.linuxArch}" or stdenvNoCC.hostPlatform.linuxArch;
 
     strictDeps = true;
     enableParallelBuilding = true;