655d52a0cd6b3df738dc9843e25a95b8930b4628 contrib: Specify wb mode when creating mac sdk (João Barbosa)
Pull request description:
Fix the warning:
```
./contrib/macdeploy/gen-sdk:84: FutureWarning: GzipFile was opened for writing, but this will change in future Python releases. Specify the mode argument for opening it for writing.
```
ACKs for top commit:
fanquake:
Tested ACK 655d52a0cd6b3df738dc9843e25a95b8930b4628 with Python 3.10.
Tree-SHA512: 095cd301f211531a8b8f50e7915fe13c7ab0b278fb23dc50a03625cfae9e2fd7a0d8c315fced4af3011552e3e455ce562b7f717a0ed096c4433ddcf24f22b2c9