Ensure syscall functions are consistently prefixed with "NaClSys"

src/untrusted/nacl/syscall_bindings_trampoline.h

 /*
  * Copyright (c) 2012 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.
  */
 /*
  * TODO(bradchen): figure out where to move this include file and then
  * move it.
  */
 
@@ skipping 144 matching lines @@
 /* ============================================================ */
 
 typedef int (*TYPE_nacl_getdents) (int desc, void *dirp, size_t count);
 
 typedef int (*TYPE_nacl_gettimeofday) (struct timeval *tv, void *tz);
 
 typedef int (*TYPE_nacl_sched_yield) (void);
 
 typedef int (*TYPE_nacl_sysconf) (int name, int *res);
 
-typedef void *(*TYPE_nacl_sysbrk) (void *p);
+typedef void *(*TYPE_nacl_brk) (void *p);
 
 typedef pid_t (*TYPE_nacl_getpid) (void);
 
 typedef clock_t (*TYPE_nacl_clock) (void);
 
 typedef int (*TYPE_nacl_nanosleep) (const struct timespec *req,
                                     struct timespec *rem);
 
 typedef int (*TYPE_nacl_clock_getres) (clockid_t clk_id,
                                        struct timespec *res);
@@ skipping 35 matching lines @@
 
 typedef int (*TYPE_nacl_test_infoleak) (void);
 
 typedef int (*TYPE_nacl_test_crash) (int crash_type);
 
 #if defined(__cplusplus)
 }
 #endif
 
 #endif  /*  NATIVE_CLIENT_SRC_UNTRUSTED_NACL_SYSCALL_BINDINGS_TRAMPOLINE_H */