casa-mp-base

dokuwiki: fix php* variants

Braces disable substitution, which means the ${php} in the variant body
was evaluated when the variants are evaluated, after the main body of
the portfile. It thus always had the last value set by the foreach
loop.

This is what the "eval subst" was fixing, but it's an antipattern
because the much simpler and better performing approach is to just not
use braces in the first place. Quotes can be used instead to group the
variant body into a single argument.