Merge upstream changes from Marlin 2.1.1

buildroot/tests/linux_native

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+#
+# Build tests for Linux x86_64
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_LINUX_RAMPS TEMP_SENSOR_BED 1
+opt_enable PIDTEMPBED EEPROM_SETTINGS BAUD_RATE_GCODE
+exec_test $1 $2 "Linux with EEPROM" "$3"
+
+# cleanup
+restore_configs