add export-binaries tag

Author: brentru

build_platform.py

@@ -258,7 +258,7 @@ def test_examples_in_folder(folderpath):
         if BUILD_WARN:
             cmd = ['arduino-cli', 'compile', '--warnings', 'all', '--fqbn', fqbn, examplepath]
         else:
-            cmd = ['arduino-cli', 'compile', '--warnings', 'none', '--fqbn', fqbn, examplepath]
+            cmd = ['arduino-cli', 'compile', '--warnings', 'none', '--export-binaries', '--fqbn', fqbn, examplepath]
         proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                                 stderr=subprocess.PIPE)
         r = proc.wait(timeout=60)