sanitycheck: allow error on deprecation warnings

Added new option to make sanitycheck script error on deprecation
warnings, to use:

sanitycheck --error-on-deprecations

For example, to find usage of legacy APIs in master, run the following:

sanitycheck -e legacy --error-on-deprecations

Change-Id: Ib83c266c8357475840dea03d62ceefed72b73f27
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
1 file changed