Rollup merge of #77710 - fortanix:raoul/bugfix-lvi, r=nikic
Rollup merge of #77710 - fortanix:raoul/bugfix-lvi, r=nikic

Update submodule llvm to get LVI bugfix

The LLVM LVI mitigations used register %rcs as a clobber register. This is problematic when rust uses this register to return (part of) function values. The problem was fixed upstream in:

    https://reviews.llvm.org/D88924
    https://reviews.llvm.org/D88925

PR https://github.com/rust-lang/llvm-project/pull/79 merged it in the llvm_project. This PR updates the submodule

Bug report: https://bugs.llvm.org/show_bug.cgi?id=47740
Fixes #77607

cc: da39a3ee5e6b4b0d3255bfef95601890afd80709@jethrogb

aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust