Add Lerdge S,X,K (#18302)

buildroot/tests/LERDGEX-tests

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+#
+# Build tests for LERDGEX environment
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_LERDGE_X
+opt_set SERIAL_PORT 1
+exec_test $1 $2 "LERDGE X with Default Configuration"
+
+# clean up
+restore_configs