Fix check using new kernel in cl-builder

scripts/cl-builder

@@ -203,13 +203,18 @@ update_from_builder() {
 			waschange=1
 		done
 	done
-	curkernellink=$(readlink /boot/vmlinuz-$(cl-kernel -v --filter cl_kernel_uid | \
-		sed -nr 's/.*\[.\]\s//p'))
-	newkernellink=vmlinuz-$(cl-kernel -v --filter cl_kernel_suffix | \
+	local roottype=$(cl-kernel -v --filter os_root_type | \
 		sed -nr 's/.*\[.\]\s//p')
+	if [[ "$roottype" != "livecd" ]]
+	then
+		local curkernellink=$(readlink /boot/vmlinuz-$(cl-kernel -v \
+			--filter cl_kernel_uid | sed -nr 's/.*\[.\]\s//p'))
+		local newkernellink=vmlinuz-$(cl-kernel -v --filter cl_kernel_suffix | \
+			sed -nr 's/.*\[.\]\s//p')
 
-	[[ "$curkernellink" != "$newkernellink" ]] && \
-	echo "For used the new kernel in the workspace perform 'cl-kernel --symlink'."
+		[[ "$curkernellink" != "$newkernellink" ]] && \
+			echo "For used the new kernel in the workspace perform 'cl-kernel --symlink'."
+	fi
 }
 
 update_from_builder $BUILDER $ROOTDIR $UPDATE_DIRS