Add abi_check.py bridge script

The bulk of the script that was moved to the framework is now a pure
python module - bridge scripts like this one will remain in each
individual branch, and continue to be the way to invoke the ABI checks.

This way we can use the bridge scripts to encode branch-specific
information in a more convenient way.

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>

scripts/abi_check.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+"""Bridge script
+See framework/scripts/mbedtls_framework/interface_checks.py for detailed documentation.
+
+This is a convenient place to encode any branch-specific information we might want to add
+in the future.
+"""
+
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+
+import framework_scripts_path # pylint: disable=unused-import
+from mbedtls_framework import interface_checks
+
+if __name__ == "__main__":
+    interface_checks.run_main()