Merge branch 'branch-0.4.0' into 'branch-0.4.0'

fix snappy include directory bug

See merge request megasearch/milvus!300

Former-commit-id: b506de958a34ad29ae262ce8078aec4ba49b4a0a

cpp/cmake/ThirdPartyPackages.cmake

@@ -1612,7 +1612,7 @@ macro(build_snappy)
     set_target_properties(snappy
                         PROPERTIES IMPORTED_LOCATION "${SNAPPY_STATIC_LIB}"
                         INTERFACE_INCLUDE_DIRECTORIES
-                        "${SNAPPY_INCLUDE_DIRS}")
+                        "${SNAPPY_INCLUDE_DIR}")
     add_dependencies(snappy snappy_ep)
 endmacro()