Include slc5_amd64_gcc434 in list of architectures

SiteTests/testjob/tests/CE-cms-swinst

@@ -109,7 +109,7 @@ echo "<h2>Sourcing the CMS environment</h2>"
 echo "<pre>"
 echo "source $SW_DIR/cmsset_default.sh"
 echo "</pre>"
-archs_defined='slc4_ia32_gcc345 slc5_ia32_gcc434 slc3_ia32_gcc323'
+archs_defined='slc4_ia32_gcc345 slc5_ia32_gcc434 slc5_amd64_gcc434 slc3_ia32_gcc323'
 archs_to_test='slc4_ia32_gcc345'
 swok=0
 for arch in $archs_defined ; do