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

ports/make/nacl.patch

 diff --git a/job.c b/job.c
 --- a/job.c
 +++ b/job.c
 @@ -29,6 +29,10 @@ this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <string.h>
  
 +#if defined(__native_client__)
 +# include <spawn.h>
 +#endif
 +
  /* Default shell to use.  */
  #ifdef WINDOWS32
  #include <windows.h>
 diff --git a/main.c b/main.c
 --- a/main.c
 +++ b/main.c
-@@ -911,6 +911,9 @@ open_tmpfile(char **name, const char *template)
- #ifdef _AMIGA
- int
- main (int argc, char **argv)
-+#elif defined(__native_client__)
-+int
-+nacl_main (int argc, char **argv)
- #else
- int
- main (int argc, char **argv, char **envp)
 @@ -921,6 +924,9 @@ main (int argc, char **argv, char **envp)
    struct dep *read_makefiles;
    PATH_VAR (current_directory);
    unsigned int restarts = 0;
 +#if defined(__native_client__)
-+  char **envp = environ;
++  envp = environ;
 +#endif
  #ifdef WINDOWS32
    char *unix_path = NULL;
    char *windows32_path = NULL;
 diff --git a/misc.c b/misc.c
 --- a/misc.c
 +++ b/misc.c
 @@ -715,7 +715,7 @@ log_access (const char *flavor)
  static void
  init_access (void)
@@ skipping 28 matching lines @@
  #else
  #ifndef        HAVE_SETREGID
 +/* TODO(sbc): remove this once nacl_io implements setuid and friends */
 +#if !(defined(__native_client__) && defined(_NEWLIB_VERSION))
    if (setgid (user_gid) < 0)
      pfatal_with_name ("user_access: setgid");
 +#endif
  #else
    if (setregid (make_gid, user_gid) < 0)
      pfatal_with_name ("user_access: setregid");