scripts: use Bazel-built version of Rust oak_loader

scripts/build_server

@@ -28,7 +28,7 @@ Build the specified version of the Oak Runtime server.
         logless)
           config='clang-logless';;
         rust)
-          config='rust';;
+          config='clang';;
         arm)
           config='armv8';;
         asan)
@@ -49,16 +49,13 @@ if [[ "${config}" == "clang" && "${OSTYPE}" == "darwin"*  ]]; then
     config='darwin'
 fi
 
-if [[ "${config}" == "rust" ]]; then
-  cargo build --release --target=x86_64-unknown-linux-musl --package=oak_loader
-else
-  bazel_build_flags+=(
-    "--config=${config}"
-  )
+bazel_build_flags+=(
+  "--config=${config}"
+)
 
-  # Use a different output_base so that we don't lose incremental state.
-  # See https://docs.bazel.build/versions/master/command-line-reference.html#flag--output_base.
-  bazel --output_base="${CACHE_DIR}/$config" build "${bazel_build_flags[@]}" \
-    //oak/server/loader:oak_runner \
-    //oak/server/storage:storage_server
-fi
+# Use a different output_base so that we don't lose incremental state.
+# See https://docs.bazel.build/versions/master/command-line-reference.html#flag--output_base.
+bazel --output_base="${CACHE_DIR}/$config" build "${bazel_build_flags[@]}" \
+  //oak/server/loader:oak_runner \
+  //oak/server/rust/oak_loader \
+  //oak/server/storage:storage_server

scripts/run_server

@@ -79,7 +79,7 @@ fi
 # Launching the server requires a `--application=<dir>/config.bin` flag.
 # `exec` is necessary for the `run_example` script to be able to get a PID of a background server.
 if [[ "${server}" == "rust" ]]; then
-  exec cargo run --release --target=x86_64-unknown-linux-musl --package=oak_loader -- \
+  exec ./bazel-clang-bin/oak/server/rust/oak_loader/oak_loader \
     --application="${APPLICATION}" \
     --ca-cert="${SCRIPTS_DIR}/../examples/certs/local/ca.pem" \
     --cert-chain="${SCRIPTS_DIR}/../examples/certs/local/local.pem" \