[meson] fix libmariadb dependency
[meson] fix libmariadb dependency

libmariadb is what should be used as only the library portion is used.

Fixes compilation under OpenWrt.

Note that mariadb.pc is a superset that links to libmariadb.

Signed-off-by: Rosen Penev <cd9d359349c2d33dfd3bf458517d943871c7c054@gmail.com>

gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4