[Unit:Sandbox::FileAccessor] Added case for '.i' file extension

spec/unit/sandbox/file_accessor_spec.rb

@@ -237,7 +237,7 @@ module Pod
           file_patterns = ['Classes/*.{h,m,d}', 'Vendor', 'framework/Source/*.h']
           options = {
             :exclude_patterns => ['Classes/**/osx/**/*', 'Resources/**/osx/**/*'],
-            :dir_pattern => '*{.m,.mm,.c,.cc,.cxx,.cpp,.c++,.swift,.h,.hh,.hpp,.ipp,.tpp}',
+            :dir_pattern => '*{.m,.mm,.i,.c,.cc,.cxx,.cpp,.c++,.swift,.h,.hh,.hpp,.ipp,.tpp}',
             :include_dirs => false,
           }
           @spec.exclude_files = options[:exclude_patterns]