regression: add tests for the supplicant plugin framework

Add test cases for checking functionality of supplicant plugins:
 - Ability to pass values and arrays to/from a plugin
 - Right handle situations with bad input parameters
 - Right handle situations with calling an unknown plugin

Signed-off-by: Aleksandr Anisimov <a.anisimov@omprussia.ru>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/ta/supp_plugin/Android.mk b/ta/supp_plugin/Android.mk
new file mode 100644
index 0000000..1633640
--- /dev/null
+++ b/ta/supp_plugin/Android.mk
@@ -0,0 +1,4 @@
+LOCAL_PATH := $(call my-dir)
+
+local_module := 380231ac-fb99-47ad-a689-9e017eb6e78a
+include $(BUILD_OPTEE_MK)