Revert "kernel: Remove unsupported 3.10, 3.12, 3.14"

This reverts commit 2441e002e2. The
motivation for removing them was not very convincing. Also, we need
3.14 on some Hydra build machines.

pkgs/os-specific/linux/kernel/linux-3.10.nix

@@ -0,0 +1,17 @@
+{ stdenv, fetchurl, perl, buildLinux, ... } @ args:
+
+import ./generic.nix (args // rec {
+  version = "3.10.92";
+  extraMeta.branch = "3.10";
+
+  src = fetchurl {
+    url = "mirror://kernel/linux/kernel/v3.x/linux-${version}.tar.xz";
+    sha256 = "0z0jdix1mfpnnc8cxw7rzpnhxdayckpnrasvxi1qf0dwhcqgk92d";
+  };
+
+  features.iwlwifi = true;
+  features.efiBootStub = true;
+  features.needsCifsUtils = true;
+  features.canDisableNetfilterConntrackHelpers = true;
+  features.netfilterRPFilter = true;
+})

pkgs/os-specific/linux/kernel/linux-3.12.nix

@@ -0,0 +1,17 @@
+{ stdenv, fetchurl, perl, buildLinux, ... } @ args:
+
+import ./generic.nix (args // rec {
+  version = "3.12.50";
+  extraMeta.branch = "3.12";
+
+  src = fetchurl {
+    url = "mirror://kernel/linux/kernel/v3.x/linux-${version}.tar.xz";
+    sha256 = "1bn07wsrcbg4qgqd4v2810c3qc0ifbcza0fyj8s54yd78g9qj4lj";
+  };
+
+  features.iwlwifi = true;
+  features.efiBootStub = true;
+  features.needsCifsUtils = true;
+  features.canDisableNetfilterConntrackHelpers = true;
+  features.netfilterRPFilter = true;
+})

pkgs/os-specific/linux/kernel/linux-3.14.nix

@@ -0,0 +1,18 @@
+{ stdenv, fetchurl, perl, buildLinux, ... } @ args:
+
+import ./generic.nix (args // rec {
+  version = "3.14.56";
+  # Remember to update grsecurity!
+  extraMeta.branch = "3.14";
+
+  src = fetchurl {
+    url = "mirror://kernel/linux/kernel/v3.x/linux-${version}.tar.xz";
+    sha256 = "1ggvjrz51nfhj7amn3v2nd0b0x8dnz68k9cldzl729cqp9gsc3hf";
+  };
+
+  features.iwlwifi = true;
+  features.efiBootStub = true;
+  features.needsCifsUtils = true;
+  features.canDisableNetfilterConntrackHelpers = true;
+  features.netfilterRPFilter = true;
+} // (args.argsOverride or {}))