base: Bump CMake to 3.6.1

Dockerfile

@@ -46,7 +46,7 @@ COPY imagefiles/.bashrc /root/
 WORKDIR /usr/src
 RUN git clone git://cmake.org/cmake.git CMake && \
    cd CMake && \
-   git checkout v3.6.0 && \
+   git checkout v3.6.1 && \
    cd .. && mkdir CMake-build && cd CMake-build && \
    /usr/src/CMake/bootstrap \
      --parallel=$(nproc) \