Fix cgo linking flags to include the dynamic linking library

[nderjung]

This allows for static PIE builds.

[nderjung]

Converted to a draft because this does not work as expected. Whilst the build can be linked, I'm receiving a timeout when connecting to a libSQL server connection, stuck within libsql_experimental.a's exported libsql_sync2 method:

error: creating connector: failed to sync database 
error code = 1: Error syncing database: replication error: Timeout performing handshake with primary

Nevermind. This does work.

The alternative is to supply -ldl via go build -ldflags='-linkmode external -extldflags "-static-pie -ldl'