.travis.yml: Exclude AddressSanitizer runs with GCC.
.travis.yml: Exclude AddressSanitizer runs with GCC.

Travis-CI's GCC does not support the address sanitizer options.

sysdb/sysdb,tokkee/sysdb,sysdb/sysdb,sysdb/sysdb,tokkee/sysdb,tokkee/sysdb