fix something

Signed-off-by: surenyi <surenyi82@163.com>

tex/openeuler.tex

@@ -504,11 +504,18 @@ wget -c https://gitee.com/src-openeuler/tcpdump/raw/master/\
     backport-0007-Introduce-nn-option.patch
 wget -c https://gitee.com/src-openeuler/tcpdump/raw/master/\
     backport-0009-Change-n-flag-to-nn-in-TESTonce.patch
+wget -c https://gitee.com/src-openeuler/tcpdump/raw/master/\
+    tcpdump-Add-sw64-architecture.patch
 \end{minted}
 
 然后修改 ``\texttt{yocto-oebuild/src/yocto-meta-openeuler/meta-\\%
 openeuler/dynamic-layers/networking-layer/recipes-support\\%
 /tcpdump/tcpdump\_\%.bbappend}'' 文件中的 ``SRC\_URI[md5sum]'' 和 
-``SRC\_URI[md5sum]''。
+``SRC\_URI[sha256sum]''。例如：
+
+\begin{minted}[bgcolor=lightgray!30,fontsize=\tiny]{bash}
+SRC_URI[md5sum] = "491aeb15c1c72d59b9288a5a6953e8a9"
+SRC_URI[sha256sum] = "ad75a6ed3dc0d9732945b2e5483cb41dc8b4b528a169315e499c6861952e73b3"
+\end{minted}
 
 \end{enumerate}