compress ota updates


I tried it.
Code:
-rw-r--r-- 1 root root 1280756511 Sep  3 12:04 xiaomi.eu_multi_HMNote4X_8.8.30_v10-7.0.zip
-rw-r--r-- 1 root root 1231480666 Sep  6 10:36 fw-less_mido_xiaomi.eu_multi_HMNote4X_8.8.30_v10-7.0.zip
Wow! About 50MB decreased!! ... Is this really necessary?