mariadb-connector-c: upgraded package to upstream

Upgraded dev-db/mariadb-connector-c to version 3.1.13 on amd64

BUG=b:199174229
TEST=sudo emerge dev-db/mariadb-connector-c

Change-Id: I2b592915a5e310858090cfcc90d893be928b8d66
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3147255
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Jordan R Abrahams <ajordanr@google.com>
Reviewed-by: Christopher Di Bella <cjdb@google.com>
Commit-Queue: Allen Webb <allenwebb@google.com>
7 files changed