tests/pthread_condition_variable: migrate to testrunner script

tests/pthread_condition_variable/Makefile

@@ -13,3 +13,6 @@ USEMODULE += xtimer
 CFLAGS += -DNATIVE_AUTO_EXIT
 
 include $(RIOTBASE)/Makefile.include
+
+test:
+	tests/01-run.py

tests/pthread_condition_variable/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')
+    child.expect('condition fulfilled.')
+    child.expect('SUCCESS')
+
+
+if __name__ == "__main__":
+    # This test can take some time to complete when testing on hardware (e.g
+    # on samr21-xpro) and the default timeout (10s) is not enough.
+    sys.exit(testrunner.run(testfunc, timeout=60))