pre-commit-hook: Create banned api checks

As part of the secure coding guidelines, Open IoT SDK project iis
forbidden to use banned APIs listed in `banned_api_list.txt` in this
repository.

A new pre-commit called banned_api hook is implemented to check if
source code is using any of the banned_apis.

Signed-off-by: Saheer Babu <saheer.babu@arm.com>