Improve NaCl support

- Add nacl_make script to build Skia targets for NaCl using gyp
- Add nacl_interface for command-line apps
- Add nacl_sample as front-end for SampleApp
- Add freetype to DEPS
- Various gyp tweaks for NaCl

TODO:
- Implement GL interface
- Implement font host
- Fix plumbing so that SampleApp works properly
Review URL: https://codereview.appspot.com/6671044

git-svn-id: http://skia.googlecode.com/svn/trunk@6245 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/benchmain.cpp b/bench/benchmain.cpp
index 6f33952..80b7871 100644
--- a/bench/benchmain.cpp
+++ b/bench/benchmain.cpp
@@ -908,7 +908,7 @@
     return 0;
 }
 
-#if !defined SK_BUILD_FOR_IOS
+#if !defined(SK_BUILD_FOR_IOS) && !defined(SK_BUILD_FOR_NACL)
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }