Fix unimportant typo in configure

that I found while looking for a separate issue.  This should not have
caused problems for any users, unless someone was really submitting an
invalid configure command that included --enable-proc-opt for a cross
compile.

mythtv/configure

@@ -2303,7 +2303,7 @@ else
     shlibdir_default="${prefix_default}/${libdir_name}"
 fi
 
-if enabled_any cpu_override croos_compile || test x"$tune" != x"generic" &&
+if enabled_any cpu_override cross_compile || test x"$tune" != x"generic" &&
     enabled proc_opt; then
     echo "Warning! --enable-proc-opt shouldn't be used with --arch, --cpu or --tune"
     echo "Disabling it now."