Added a few missing userinput tags.

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@7395 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter06/bison.xml

@@ -52,7 +52,7 @@
     program is not already in $PATH.  The following addition will correct
     this.</para>
 
-<screen>echo '#define YYENABLE_NLS 1' >> config.h</screen>
+<screen><userinput>echo '#define YYENABLE_NLS 1' &gt;&gt; config.h</userinput></screen>
 
     <para>Compile the package:</para>
 

chapter06/gcc.xml

@@ -73,7 +73,7 @@
     temporary files.  We will be installing mktemp later, so the following sed
     will simulate its presence.</para>
 
-<screen>sed -i 's/@have_mktemp_command@/yes/' gcc/gccbug.in</screen>
+<screen><userinput>sed -i 's/@have_mktemp_command@/yes/' gcc/gccbug.in</userinput></screen>
 
     <para>The GCC documentation recommends building GCC outside of the source
     directory in a dedicated build directory:</para>