Update linphone (liblinphone_tester: add ability to disable hosts overriding)

added 21 commits

• a4dd48b7...a523bf6a - 20 commits from branch master
• e07a13f5 - Update linphnoe (liblinphone_tester: add ability to pass 'none' to --dns-hosts...

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enabled an automatic merge when the pipeline for e07a13f5 succeeds

merged