newlib: move to by-name

pkgs/top-level/all-packages.nix

···
 
   xp-pen-deco-01-v2-driver = libsForQt5.xp-pen-deco-01-v2-driver;
 
-  newlib = callPackage ../development/misc/newlib { };
-
-  newlib-nano = callPackage ../development/misc/newlib {
+  newlib-nano = newlib.override {
     nanoizeNewlib = true;
   };