Install arm rust target too

Author: milot-mirdita

Dockerfile.GPU-buster-cross-sbsa

@@ -25,6 +25,9 @@ RUN dpkg --add-architecture arm64; \
     rm -rf /var/lib/apt/lists/*; \
     curl https://sh.rustup.rs -sSf | \
         sh -s -- --default-toolchain stable -y; \
+    rustup target add \
+        x86_64-unknown-linux-gnu \
+        aarch64-unknown-linux-gnu; \
     curl https://apt.llvm.org/llvm.sh -sSf | \
         bash -s -- 20; \
     echo "set(CMAKE_SYSTEM_NAME Linux)" > /opt/toolchain.cmake; \