def-tool: Rename FWK to SYSTEM and VND to VENDOR

This commit replaces abbrevations to full names, e.g. FWK-ONLY to
SYSTEM-ONLY and VND-ONLY to VENDOR-ONLY.

Test: ./tests/run.sh
Change-Id: Icf78c7097535ddff40f71a986501858936574f25
2 files changed