add back libz link

Author: LocutusOfBorg

CMakeLists.txt

@@ -130,8 +130,10 @@ set(LICENSE "Mozilla Public License Version 2.0")
 find_package(Threads REQUIRED)
 if(WITH_DLT_LOGSTORAGE_GZIP)
     find_package(ZLIB 1.2.9 REQUIRED)
+    set(ZLIB_LIBRARY "ZLIB::ZLIB")
 elseif(WITH_DLT_COREDUMPHANDLER OR WITH_DLT_FILETRANSFER)
     find_package(ZLIB REQUIRED)
+    set(ZLIB_LIBRARY "ZLIB::ZLIB")
 else()
     set(ZLIB_LIBRARY "")
 endif()