databases/mariadb103-server: Security update to 10.3.11

• Add workaround for LZ4, SNAPPY build issues [1]

PR: 233212 [1]
Reported by: Peter Putzer <freebsd mnd sc>
MFH: 2018Q4
Security: ec5072b0-d43a-11e8-a6d2-b499baebfeaf