linux_latest: 5.13.13 -> 5.14

(cherry picked from commit 5d1c50837be54312b71ac83ddc1d1b6629d09073)

pkgs/os-specific/linux/kernel/linux-5.14.nix

@@ -0,0 +1,18 @@
+{ lib, buildPackages, fetchurl, perl, buildLinux, nixosTests, modDirVersionArg ? null, ... } @ args:
+
+with lib;
+
+buildLinux (args // rec {
+  version = "5.14";
+
+  # modDirVersion needs to be x.y.z, will automatically add .0 if needed
+  modDirVersion = if (modDirVersionArg == null) then concatStringsSep "." (take 3 (splitVersion "${version}.0")) else modDirVersionArg;
+
+  # branchVersion needs to be x.y
+  extraMeta.branch = versions.majorMinor version;
+
+  src = fetchurl {
+    url = "mirror://kernel/linux/kernel/v5.x/linux-${version}.tar.xz";
+    sha256 = "1cki6af9r30k8820j73qdyycp23mwpf2a2rjwl82p9i61mg8n1ky";
+  };
+} // (args.argsOverride or { }))