Bump third_party/open-source-pdks from `fd509b9` to `0516eff`

Bumps [third_party/open-source-pdks](https://github.com/google/open-source-pdks) from `fd509b9` to `0516eff`.
- [Release notes](https://github.com/google/open-source-pdks/releases)
- [Commits](https://github.com/google/open-source-pdks/compare/fd509b924cb902dd0650d04889a95072040144ee...0516effa229623ee8ecdb44df79f519af25d38b8)

---
updated-dependencies:
- dependency-name: third_party/open-source-pdks
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

third_party/open-source-pdks

diff --git a/third_party/open-source-pdks b/third_party/open-source-pdks
index fd509b9..0516eff 160000
--- a/third_party/open-source-pdks
+++ b/third_party/open-source-pdks
@@ -1 +1 @@
-Subproject commit fd509b924cb902dd0650d04889a95072040144ee
+Subproject commit 0516effa229623ee8ecdb44df79f519af25d38b8