More cmake ROCM tweaks

Author: malfet

manywheel/Dockerfile

@@ -172,8 +172,9 @@ RUN bash ./install_rocm_magma.sh && rm install_rocm_magma.sh
 # cmake3 is needed for the later MIOpen custom build, so that step is last.
 RUN yum install -y python3-pip && \
     python3 -mpip install cmake==3.18.4 && \
+    rm -f /usr/bin/cmake && \
     ln -s /usr/local/bin/cmake /usr/bin/cmake && \
-    ln -s /usr/local/bin/cmake /usr/bin/cmake
+    ln -s /usr/local/bin/cmake /usr/bin/cmake3
 
 ADD ./common/install_miopen.sh install_miopen.sh
 RUN bash ./install_miopen.sh ${ROCM_VERSION} && rm install_miopen.sh