update dockfile to support chinese encode in lac example

tools/Dockerfile

@@ -9,4 +9,6 @@ RUN yum -y install wget && \
     yum -y install python3 python3-devel && \
     yum clean all && \
     curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py && \
-    python get-pip.py && rm get-pip.py
+    python get-pip.py && rm get-pip.py && \
+    localedef -c -i en_US -f UTF-8 en_US.UTF-8 && \
+    echo "export LANG=en_US.utf8" >> /root/.bashrc

tools/Dockerfile.centos6.devel

@@ -44,4 +44,6 @@ RUN yum -y install wget && \
     cd .. && rm -rf Python-3.6.8* && \
     pip3 install google protobuf setuptools wheel flask numpy==1.16.4 && \
     yum -y install epel-release && yum -y install patchelf libXext libSM libXrender && \
-    yum clean all
+    yum clean all && \
+    localedef -c -i en_US -f UTF-8 en_US.UTF-8 && \
+    echo "export LANG=en_US.utf8" >> /root/.bashrc

tools/Dockerfile.centos6.gpu.devel

@@ -44,4 +44,5 @@ RUN yum -y install wget && \
     cd .. && rm -rf Python-3.6.8* && \
     pip3 install google protobuf setuptools wheel flask numpy==1.16.4 && \
     yum -y install epel-release && yum -y install patchelf libXext libSM libXrender && \
-    yum clean all
+    yum clean all && \
+    echo "export LANG=en_US.utf8" >> /root/.bashrc

tools/Dockerfile.devel

@@ -21,4 +21,6 @@ RUN yum -y install wget >/dev/null \
     && yum install -y python3 python3-devel \
     && pip3 install google protobuf setuptools wheel flask \
     && yum -y install epel-release && yum -y install patchelf libXext libSM libXrender\
-    && yum clean all
+    && yum clean all \
+    && localedef -c -i en_US -f UTF-8 en_US.UTF-8 \
+    && echo "export LANG=en_US.utf8" >> /root/.bashrc

tools/Dockerfile.gpu

@@ -15,6 +15,7 @@ RUN yum -y install wget && \
     echo 'export LD_LIBRARY_PATH=/usr/local/cuda/lib64:$LD_LIBRARY_PATH' >> /root/.bashrc && \
     ln -s /usr/local/cuda-9.0/targets/x86_64-linux/lib/libcudnn.so.7 /usr/local/cuda-9.0/targets/x86_64-linux/lib/libcudnn.so && \
     echo 'export LD_LIBRARY_PATH=/usr/local/cuda-9.0/targets/x86_64-linux/lib:$LD_LIBRARY_PATH' >> /root/.bashrc && \
+    echo "export LANG=en_US.utf8" >> /root/.bashrc && \
     mkdir -p /usr/local/cuda/extras
 
 COPY --from=builder /usr/local/cuda/extras/CUPTI /usr/local/cuda/extras/CUPTI

tools/Dockerfile.gpu.devel

@@ -22,4 +22,5 @@ RUN yum -y install wget >/dev/null \
     && yum install -y python3 python3-devel \
     && pip3 install google protobuf setuptools wheel flask \
     && yum -y install epel-release && yum -y install patchelf libXext libSM libXrender\
-    && yum clean all
+    && yum clean all \
+    && echo "export LANG=en_US.utf8" >> /root/.bashrc