textproc/trdsql: Update to 0.7.6

From ChangeLog: https://github.com/noborus/trdsql/releases/v0.7.6

• Fixed error in long line of LTSV.
• Added -onowrap option. Avoid long column wrapping in at/md.
• Added _example/writer. Here is an example of Writer.

PR: 246633
Submitted by: vulcan@wired.sh (maintainer)