updated build system

docker/x86_64/flutter

@@ -11,7 +11,6 @@ RUN apt-get install -y \
   gdb \
   git \
   lib32stdc++6 \
-  libgconf-2-4 \
   libglu1-mesa \
   libstdc++6 \
   python3 \

docker/x86_64/mingw64

@@ -924,6 +924,7 @@ RUN if [ -f "/3rd_party/rocksdb-${MY_ROCKSDB_VERSION}.tar.gz" ]; then \
         -DROCKSDB_INSTALL_ON_WINDOWS=ON \
         -DWITH_BENCHMARK=OFF \
         -DWITH_BENCHMARK_TOOLS=OFF \
+        -DWITH_BZ2=OFF \
         -DWITH_CORE_TOOLS=OFF \
         -DWITH_EXAMPLES=OFF \
         -DWITH_GFLAGS=OFF \
@@ -1169,6 +1170,8 @@ ARG UID=1000
 ARG GID=1000
 ARG USERNAME=myuser
 
+RUN delgroup scanner || echo "no scanner group found"
+
 RUN addgroup -g $GID $USERNAME && \
     adduser -D -u $UID -G $USERNAME -h /home/$USERNAME $USERNAME