Git submodule: Bump libs/hbb_common from `49c6b24` to `7cf11f7` (#523)

Bumps [libs/hbb_common](https://github.com/rustdesk/hbb_common) from `49c6b24` to `7cf11f7`.
- [Commits](https://github.com/rustdesk/hbb_common/compare/49c6b24a7a8c39d4448e07b743007ef1a3febd43...7cf11f7b771e27ecbd14fd1dd0ced55a64f40eb5)

---
updated-dependencies:
- dependency-name: libs/hbb_common
  dependency-type: direct:production
...

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libs/hbb_common

@@ -1 +1 @@
-Subproject commit 49c6b24a7a8c39d4448e07b743007ef1a3febd43
+Subproject commit 7cf11f7b771e27ecbd14fd1dd0ced55a64f40eb5