better symbol stripping

SocketRocket.xcodeproj/project.pbxproj

@@ -517,6 +517,7 @@
 				CLANG_ENABLE_OBJC_ARC = YES;
 				COPY_PHASE_STRIP = YES;
 				GCC_C_LANGUAGE_STANDARD = "compiler-default";
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;