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

ports/gtk+/nacl.patch

Index: ports/gtk+/nacl.patch
diff --git a/ports/gtk+/nacl.patch b/ports/gtk+/nacl.patch
index 0e191217f16f58bd74876769bb5956c28f5f5a1d..e254d32c036b225ca48d42e7a04b0f2e784e26aa 100644
--- a/ports/gtk+/nacl.patch
+++ b/ports/gtk+/nacl.patch
@@ -54,15 +54,3 @@ diff --git a/perf/marshalers.c b/perf/marshalers.c
  
  /* VOID:ENUM,OBJECT,DOUBLE (./marshalers.list:2) */
  void
-diff --git a/tests/autotestkeywords.cc b/tests/autotestkeywords.cc
---- a/tests/autotestkeywords.cc
-+++ b/tests/autotestkeywords.cc
-@@ -36,4 +36,8 @@
- #undef GDK_ROOT_WINDOW
- #endif
- 
-+#ifdef __native_client__
-+extern "C" int nacl_main();
-+#endif
-+
- int main() { return 0; }