remove superfluous includes

- reduce compile time by a little bit (full-core: ~0.7s for me)
- thanks to 'include-what-you-use' for some help
- include Standard C header files before any other (coding style)

1 files changed, 1 insertions, 1 deletions

diff --git a/tasks/mrbgems_test.rake b/tasks/mrbgems_test.rake
index cf907a510..36c8e84b7 100644
--- a/tasks/mrbgems_test.rake
+++ b/tasks/mrbgems_test.rake
@@ -5,7 +5,7 @@ MRuby.each_target do
     file test_rbobj => g.test_rbireps
     file g.test_rbireps => [g.test_rbfiles].flatten + [g.build.mrbcfile] do |t|
       open(t.name, 'w') do |f|
-        g.print_gem_init_header(f)
+        g.print_gem_test_header(f)
         test_preload = [g.dir, MRUBY_ROOT].map {|dir|
           File.expand_path(g.test_preload, dir)
         }.find {|file| File.exist?(file) }