databases/mariadb105-server: Fix DB corruption

• InnoDB corrupts files due to incorrect st_blksize calculation

PR: 257728
Reported by: mfechner
Obtained from: https://jira.mariadb.org/projects/MDEV/issues/MDEV-26537
MFH: 2021Q3

(cherry picked from commit 48fcfdf50f2638c9e9815454c1db6e2116f15e57)