tool: Do not output libcurl source for the information only parameters

Ensure a source file isn't generated for the following informational
command line parameters when --libcurl is specified:

--help, --manual, --version and --engine list

As the output would only include a fairly empty looking main() function
and a call to curl_easy_init() and curl_easy_cleanup() when performed
with --engine list.

src/tool_operate.c

@@ -1839,6 +1839,9 @@ CURLcode operate(struct GlobalConfig *config, int argc, argv_item_t argv[])
 #ifndef CURL_DISABLE_LIBCURL_OPTION
         /* Cleanup the libcurl source output */
         easysrc_cleanup();
+
+        /* Dump the libcurl code if previously enabled */
+        dumpeasysrc(config);
 #endif
       }
       else
@@ -1846,12 +1849,5 @@ CURLcode operate(struct GlobalConfig *config, int argc, argv_item_t argv[])
     }
   }
 
-#ifndef CURL_DISABLE_LIBCURL_OPTION
-  /* Dump the libcurl code if previously enabled.
-     NOTE: that this function relies on config->errors amongst other things
-     so not everything can be closed and cleaned before this is called */
-  dumpeasysrc(config);
-#endif
-
   return result;
 }