This patch corrects a problem found in PB. Some platforms have very
different locations for the mysql installation. The client was not
able to find either my_print_defaults or mysqld predictably.

The patch adds two new command options --mysqld and --my-print-defaults
which can be used to provide the location of mysqld and
my_print_defaults by providing the paths.

The patch also changes the concatenation of the soname extension to
fix a problem found on some Ubuntu systems.

The patch contains changes to the test to ensure it will run on all
platforms. A trap is set in the test to skip testing if the location
of mysqld, my_print_defaults, or the daemon_example.ini files cannot
be determined.