net-analyzer/ndoutils: replace virtual/mysql build-time dependency.

net-analyzer/ndoutils: replace virtual/mysql build-time dependency.

The ndoutils build system (m4/np_mysqlclient.m4) requires the
mysql_config program at build time but doesn't require any of the
other server files to be present Per bug 665954, I've replaced the
virtual/mysql DEPEND with dev-db/mysql-connector-c.

The mysql virtual is still used in RDEPEND because, as far as I know,
either server is still supported at runtime regardless of the client
library in use.

In an unrelated change, two symlinks were made relative to please
repoman. Their targets were also made executable, since otherwise
you can't run them via the symlinks.

Closes: https://bugs.gentoo.org/665954
Package-Manager: Portage-2.3.40, Repoman-2.3.9