tests/pthread_barrier: migrate to testrunner script

tests/pthread_barrier/Makefile

@@ -14,3 +14,6 @@ USEMODULE += random
 USEMODULE += xtimer
 
 include $(RIOTBASE)/Makefile.include
+
+test:
+	tests/01-run.py

tests/pthread_barrier/tests/01-run.py

+#!/usr/bin/env python3
+
+import os
+import sys
+
+sys.path.append(os.path.join(os.environ['RIOTBASE'], 'dist/tools/testrunner'))
+import testrunner
+
+
+def testfunc(child):
+    child.expect('START')
+    for i in range(4):
+        child.expect('Start {}'.format(i + 1))
+    child.expect('Done 2')
+    child.expect('Done 1')
+    child.expect('Done 3')
+    child.expect('Done 4')
+    child.expect('SUCCESS')
+
+
+if __name__ == "__main__":
+    sys.exit(testrunner.run(testfunc))