extra/yassl/src/buffer.cpp:323
null pointer passed as argument 2, which is declared to never be null

Move testcases for bug 21893562 from gis_bug_crashes to a separate
file gis_not_ubsan.test
This bug must be fixed by the boost geometry project

sql/binlog.cc:2331
sql/rpl_gtid_state.cc:178
sql/handler.cc:2012
member call on null pointer of type 'struct Gtid_state'

sql/field.cc:8405
null pointer passed as argument 2, which is declared to never be null

mysys/mf_iocache.cc:1438
null pointer passed as argument 2, which is declared to never be null
Fix: Log_event::wrapper_my_b_safe_write check for size == 0

sql/mysqld.cc
Add "ubsan" to server name if built with HAVE_UBSAN.
Add not_ubsan.inc
This allows mtr tests to do --source include/not_ubsan.inc

sql/partition_info.cc:1572
signed integer overflow: 0 - -9223372036854775808 cannot be represented in type 'long long int'

storage/innobase/include/ut0mem.ic:39
null pointer passed as argument 2, which is declared to never be null

keyring unit tests: disable all test cases which use googlemock.