linux: 4.13-rc7 -> 4.14-rc1

pkgs/os-specific/linux/kernel/common-config.nix

···
   # Media support.
   MEDIA_DIGITAL_TV_SUPPORT y
   MEDIA_CAMERA_SUPPORT y
-  MEDIA_RC_SUPPORT y
+  ${optionalString (versionOlder version "4.14") ''
+    MEDIA_RC_SUPPORT y
+  ''}
   MEDIA_USB_SUPPORT y
   MEDIA_PCI_SUPPORT y
 

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

···
 { stdenv, hostPlatform, fetchurl, perl, buildLinux, ... } @ args:
 
 import ./generic.nix (args // rec {
-  version = "4.13-rc7";
-  modDirVersion = "4.13.0-rc7";
-  extraMeta.branch = "4.13";
+  version = "4.14-rc1";
+  modDirVersion = "4.14.0-rc1";
+  extraMeta.branch = "4.14";
 
   src = fetchurl {
     url = "https://git.kernel.org/torvalds/t/linux-${version}.tar.gz";
-    sha256 = "1xkfxsvdhd0xcfjcr78222sa58i02z2ca9fv804jbyp7w9g628rm";
+    sha256 = "0dhcsjgcy28pyyzwf2s0862p92bwb324kapli2y9n90bw0kl53gi";
   };
 
   features.iwlwifi = true;