[FS#809] Commit 8040420b006a744ad65d4f2bedf5682140df1f42 (tools/flex: update to 2.6.3) breaks Unbound build

[LEDE Bugs]

The following task is now closed:

FS#809 - Commit 8040420b006a744ad65d4f2bedf5682140df1f42 (tools/flex: update to 2.6.3) breaks Unbound build
User who did this - Felix Fietkau (nbd)

Reason for closing: Fixed
More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=809