eyeD3: 0.6.18 - Install tool with name 'eyeD3', not 'eyeD3_script'

This package provides a command line tool named 'eyeD3'. However
the formula installs it under the name 'eyeD3_script'. This breaks
scripts/workflows that expect to find the tool by its official name.

Also correct a typo.

Remark: 'bin.install_symlink' needs a hash argument where source
and target names differ. But the formula separated source & target
names with a ','. Looks like an inadvertent slip to me.