MSAN: unwind (fixing clang 22) odbc + connect + sqlite.

[grooverdan]

clang Unwind fix unblocks #912

libodbcinst is instrumented for MDBF-1196 and installed.

connect.odbc_sqlite3 triggers:

==34225==WARNING: MemorySanitizer: use-of-uninitialized-value
   #0 0x7f97a01ae354 in foreach_dirinpath /msan-build/libltdl/ltdl.c:702:18
   #1 0x7f97a01ad4ca in find_handle /msan-build/libltdl/ltdl.c:805:8
   #2 0x7f97a01ad4ca in try_dlopen /msan-build/libltdl/ltdl.c:1468:10
   #3 0x7f97a01ac760 in lt_dlopenadvise /msan-build/libltdl/ltdl.c:1667:11
   #4 0x7f97a01ac760 in lt_dlopen /msan-build/libltdl/ltdl.c:1622:10
   #5 0x7f97a01310af in odbc_dlopen /msan-build/DriverManager/SQLConnect.c:842:16
   #6 0x7f97a012e355 in __connect_part_one /msan-build/DriverManager/SQLConnect.c:1182:38
   #7 0x7f97a013dff7 in SQLDriverConnect /msan-build/DriverManager/SQLDriverConnect.c:1403:11
   #8 0x7f97a07b92e1 in ODBConn::DriverConnect(unsigned int) /source/storage/connect/odbconn.cpp:1306:8
   #9 0x7f97a07b057d in ODBConn::Open(char const*, odbc_parms*, unsigned int) /source/storage/connect/odbconn.cpp:1160:11
   #10 0x7f97a07afdb7 in ODBCColumns(_global*, char const*, char const*, char const*, char const*, int, bool, odbc_parms*) /source/storage/connect/odbconn.cpp:353:14
   #11 0x7f97a058ca1e in connect_assisted_discovery(handlerton*, THD*, TABLE_SHARE*, HA_CREATE_INFO*) /source/storage/connect/ha_connect.cc:6037:14
   #12 0x5636f3ef7896 in create_table_impl(THD*, st_ddl_log_state*, st_ddl_log_state*, st_mysql_const_lex_string const&, st_mysql_const_lex_string const&, st_mysql_const_lex_string const&, st_mysql_const_lex_string const&, st_mysql_const_lex_string const&, DDL_options_st, HA_CREATE_INFO*, Alter_info*, int, bool*, st_key**, unsigned int*, st_mysql_const_unsigned_lex_string*) /source/sql/sql_table.cc:4802:13
   #13 0x5636f3ef6048 in mysql_create_table_no_lock(THD*, st_ddl_log_state*, st_ddl_log_state*, Table_specification_st*, Alter_info*, bool*, int, TABLE_LIST*) /source/sql/sql_table.cc:4955:8
   #14 0x5636f3f370ae in mysql_create_table(THD*, TABLE_LIST*, Table_specification_st*, Alter_info*) /source/sql/sql_table.cc:5202:7
   #15 0x5636f3f33879 in Sql_cmd_create_table_like::execute(THD*) /source/sql/sql_table.cc:13222:12
   #16 0x5636f3c77935 in mysql_execute_command(THD*, bool) /source/sql/sql_parse.cc:6201:26
   #17 0x5636f3c684e0 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /source/sql/sql_parse.cc:8223:18
   #18 0x5636f3c618e4 in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /source/sql/sql_parse.cc:1924:7
   #19 0x5636f3c6950b in do_command(THD*, bool) /source/sql/sql_parse.cc:1434:17
   #20 0x5636f4090b8c in do_handle_one_connection(CONNECT*, bool) /source/sql/sql_connect.cc:1475:11
   #21 0x5636f4090645 in handle_one_connection /source/sql/sql_connect.cc:1387:5
   #22 0x5636f4be0ce9 in pfs_spawn_thread /source/storage/perfschema/pfs.cc:2201:3
   #23 0x7f97a77edb7a  (/lib/x86_64-linux-gnu/libc.so.6+0x92b7a) (BuildId: 58749c528985eab03e6700ebc1469fa50aa41219)
   #24 0x7f97a786b7f7  (/lib/x86_64-linux-gnu/libc.so.6+0x1107f7) (BuildId: 58749c528985eab03e6700ebc1469fa50aa41219)

But as /etc/odbc* isn't copied to /usr/local/etc this test is skipped on MSAN builders stil.

[RazvanLiviuVarzaru]

Thanks!