ABI: Update section name in script and internal allowed list

With commit 'e8332176 ANDROID: KMI symbol lists: migrate section name'
section name is updated for allowed list. Update the usage to
symbol_list in script as well.

Change-Id: Ie6aa6706405a8b0a79359d4314679c48e42160db
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>