trivial-builders: Sanitize derivation name

This then supports using functions like writeShellScriptBin with script names
that would be invalid as derivation names

pkgs/build-support/trivial-builders.nix

@@ -4,7 +4,8 @@ let
 
   runCommand' = runLocal: stdenv: name: env: buildCommand:
     stdenv.mkDerivation ({
-      inherit name buildCommand;
+      name = lib.strings.sanitizeDerivationName name;
+      inherit buildCommand;
       passAsFile = [ "buildCommand" ];
     }
     // (lib.optionalAttrs runLocal {