Merge upstream changes from Marlin 2.1.2.1

buildroot/tests/STM32F103RC_fysetc

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+#
+# Build tests for STM32F103RC_fysetc
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+use_example_configs "Creality/Ender-3/FYSETC Cheetah 1.2/BLTouch"
+exec_test $1 $2 "Ender-3 with Cheetah 1.2 | BLTouch" "$3"
+
+# clean up
+restore_configs