Lucian Adrian Grijincu

fix anon-struct usage that's a warning/error -Wnon-c-typedef-for-linkage (#137)

2

Summary: X-link: https://github.com/facebook/CacheLib/pull/137 Fix error: anonymous non-C-compatible type given name for linkage purposes by alias declaration; add a tag name here [-Werror,-Wnon-c-typedef-for-linkage] Reviewed By: philippv Differential Revision: D36043476