DO NOT MERGE Change the cache partition size check into warnings.

For some old builds, we may not define cache partition size. Change the
exception into a warning to make the script backward compatible.

Change-Id: Ia90531e3455d4888cfac6510cab879c50883be53
(cherry picked from commit 575d68a48edc90d655509f2980dacc69958948de)
3 files changed