Switch from using 'nacl_main' to 'main' entry point

ports/devenv/jseval.c

 // Copyright (c) 2014 The Native Client Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <assert.h>
 #include <spawn.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ skipping 47 matching lines @@
   }
   wrote_len = fwrite(data, 1, len, file);
   if (wrote_len != len) {
     fprintf(stderr, "ERROR: Failed writting to: %s\n", filename);
     fclose(file);
     exit(1);
   }
   fclose(file);
 }
 
-int nacl_main(int argc, char** argv) {
+int main(int argc, char** argv) {
   char* indata = 0;
   const char* cmd;
   char* outdata;
   size_t outdata_len;
 
   if ((argc != 3 && argc != 4) ||
       (strcmp(argv[1], "-f") != 0 && strcmp(argv[1], "-e") != 0)) {
     usage();
     return 1;
   }
@@ skipping 11 matching lines @@
   } else {
     jseval(cmd, NULL, NULL);
   }
 
   if (strcmp(argv[1], "-f") == 0) {
     free(indata);
   }
 
   return 0;
 }