Re-add CMake package

This appears to be needed by the Rust build.

Author: petrhosek

src/ci/docker/dist-fuchsia/Dockerfile

@@ -8,8 +8,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   ca-certificates \
   python2.7-dev \
   git \
+  cmake \
+  ninja-build \
   sudo \
   bzip2 \
+  xz-utils \
   unzip
 
 WORKDIR /tmp