env(unittest): add missing lib

Former-commit-id: 3d923d0a8588226084f6935b184798f2a402849c

cpp/unittest/db/CMakeLists.txt

@@ -39,6 +39,7 @@ set(db_libs
         sqlite3
         boost_system
         boost_filesystem
+        lz4
         )
 
 target_link_libraries(db_test ${unittest_libs} ${db_libs})

cpp/unittest/faiss_wrapper/CMakeLists.txt

@@ -42,6 +42,7 @@ set(wrapper_libs
         bz2
         z
         zstd
+        lz4
         )
 target_link_libraries(wrapper_test ${unittest_libs} ${wrapper_libs})
 

cpp/unittest/server/CMakeLists.txt

@@ -46,6 +46,7 @@ set(require_libs
         cudart
         cublas
         sqlite3
+        lz4
         )
 
 target_link_libraries(server_test