libsndfile: Add CVE-2018-13419 to CVE_CHECK_WHITELIST

[masami256]

Purpose of pull request

Upstream closed this bug (libsndfile/libsndfile#398) because it is not reproducible and not test script was provided.
So, it is okay to ignore this CVE.

Test

How to test

Run cve-check task

# bitbake libsndfile1 -c cve_check

Test result

Without this patch CVE-2018-13419 should be shown.

NOTE: Executing RunQueue Tasks
WARNING: libsndfile1-1.0.28-r0 do_cve_check: Found unpatched CVE (CVE-2018-13419), for more information check /home/build/work/emlinux/latest-dev/build/tmp-glibc/work/aarch64-emlinux-linux/libsndfile1/1.0.28-r0/temp/cve.log
NOTE: Tasks Summary: Attempted 2 tasks of which 0 didn't need to be rerun and all succeeded.

With this patch CVE-2018-13419 shouldn't be shown.

Initialising tasks: 100% |#############################################################################################################################################################| Time: 0:00:00
NOTE: Executing RunQueue Tasks
NOTE: Tasks Summary: Attempted 2 tasks of which 0 didn't need to be rerun and all succeeded.

[hiraku-wfs]

Thanks!