Log Message:
math/bc-gh: Update to 3.1.2

At my request, upstream added a flag to install all locales, rather
than the locales that are installed on the current system.  This leads
to a consistent PLIST (and more locales).

## 3.1.2

This is a production release that adds a way to install *all* locales. Users do
***NOT*** need to upgrade.

For package maintainers wishing to make use of the change, just pass `-l` to
`configure.sh`.