CI: rfl: move job forward to Linux v6.17-rc5 to remove temporary commits

v6.17-rc5 contains the equivalent of the two commits we had here, thus
move the Rust for Linux job forward to that so that we don't need the
temporary commits anymore.

Signed-off-by: Miguel Ojeda <[email protected]>

Author: ojeda

src/ci/docker/scripts/rfl-build.sh

@@ -2,9 +2,7 @@
 
 set -euo pipefail
 
-# https://github.com/rust-lang/rust/pull/144443
-# https://github.com/rust-lang/rust/pull/145928
-LINUX_VERSION=8851e27d2cb947ea8bbbe8e812068f7bf5cbd00b
+LINUX_VERSION=v6.17-rc5
 
 # Build rustc, rustdoc, cargo, clippy-driver and rustfmt
 ../x.py build --stage 2 library rustdoc clippy rustfmt