I've noticed it only because I have backup (modified to add python support).
Without adding -r1 patches was added:
Steps to Reproduce:
No version bump.
As a result of this anybody who merged package before this change was build it without newer patches.
New ebuild with version 184.108.40.206-r1 (and possibly 220.127.116.11-r2) should be created.
The changes in the patches were to fix compile problems, so there's no need to make all the users to rebuild it.
Not to mention that .12 is stable for security now...