[dbus-broker] bring rustc and bindgen

to make it compile with bus1/dbus-broker#399

Author: evverx

projects/dbus-broker/Dockerfile

@@ -14,7 +14,8 @@
 #
 ################################################################################
 
-FROM gcr.io/oss-fuzz-base/base-builder
+FROM gcr.io/oss-fuzz-base/base-builder-rust
 RUN git clone --depth 1 https://github.com/bus1/dbus-broker
+RUN cargo install bindgen-cli
 WORKDIR dbus-broker
 COPY *.c build.sh $SRC/

projects/dbus-broker/build.sh

@@ -37,6 +37,10 @@ apt-get update -y
 
 if [[ "$ARCHITECTURE" == i386 ]]; then
     apt-get install -y pkg-config:i386
+
+    RUST_TARGET=i686-unknown-linux-gnu
+    rustup target add "$RUST_TARGET"
+    export RUSTC="rustc --target=$RUST_TARGET"
 else
     apt-get install -y pkg-config
 fi