Integrate LLVM at llvm/llvm-project@6f85d9e104ca

Updates LLVM usage to match
[6f85d9e104ca](https://github.com/llvm/llvm-project/commit/6f85d9e104ca)

PiperOrigin-RevId: 389679197

SUBMODULE_VERSIONS.txt

diff --git a/SUBMODULE_VERSIONS.txt b/SUBMODULE_VERSIONS.txt
index 7358e5a..ee7cb31 100644
--- a/SUBMODULE_VERSIONS.txt
+++ b/SUBMODULE_VERSIONS.txt
@@ -4,7 +4,7 @@
 aa533abfd4232b01f9e57041d70114d5a77e6de0 third_party/googletest
 88b845dee001723c4a0db1fe5477de735b6d3bb0 third_party/liburing
 acd6f6f014c25e46363e718381e0b35205df2d83 third_party/libyaml
-8a7c657c4d65deb13880634823659d9e9d924e4a third_party/llvm-project
+6f85d9e104ca5f785718b25dccb5817b0c6c208d third_party/llvm-project
 874ee7cd2a175492502f677a29ba60f1e7d2d2f0 third_party/mlir-hlo
 4c7697dbe973ed01ae6fbec37d186ebd05982e1f third_party/pybind11
 2e1b5fb39ebc2ef4cb77005f8267e4f3a6241ba1 third_party/spirv_cross

third_party/llvm-project

diff --git a/third_party/llvm-project b/third_party/llvm-project
index 8a7c657..6f85d9e 160000
--- a/third_party/llvm-project
+++ b/third_party/llvm-project
@@ -1 +1 @@
-Subproject commit 8a7c657c4d65deb13880634823659d9e9d924e4a
+Subproject commit 6f85d9e104ca5f785718b25dccb5817b0c6c208d