scripts: build_gst: Install Rust and cargo-c

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Author: patrickelectric

scripts/build_gst.sh

@@ -231,6 +231,12 @@ apt-get install --assume-yes --no-install-recommends --mark-auto \
     "${GST_BUILD_TOOLS[@]}" "${GST_BUILD_LIBS[@]}"
 python3 -m pip install --no-cache-dir "${GST_PIP_DEPENDENCIES[@]}"
 
+# Install Rust toolchain (needed for gst-plugins-rs: intersink, intersrc, etc.)
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --profile minimal
+# shellcheck source=/dev/null
+source "$HOME/.cargo/env"
+cargo install cargo-c
+
 # Download and install IL headers if needed:
 if [ -n "$USERLAND_PATH" ]; then
     git clone https://github.com/raspberrypi/userland.git "$USERLAND_PATH" --branch 54fd97ae4066a10b6b02089bc769ceed328737e0 \