tests.fetchDebianPatch: fix patch name

pkgs/build-support/fetchdebianpatch/tests.nix

···
     pname = "pysimplesoap";
     version = "1.16.2";
     debianRevision = "5";
-    patch = "Add-quotes-to-SOAPAction-header-in-SoapClient";
+    patch = "Add-quotes-to-SOAPAction-header-in-SoapClient.patch";
     hash = "sha256-xA8Wnrpr31H8wy3zHSNfezFNjUJt1HbSXn3qUMzeKc0=";
   };
 
···
     pname = "libfile-pid-perl";
     version = "1.01";
     debianRevision = "2";
-    patch = "missing-pidfile";
+    patch = "missing-pidfile.patch";
     hash = "sha256-VBsIYyCnjcZLYQ2Uq2MKPK3kF2wiMKvnq0m727DoavM=";
   };
 }