games/freecell-solver: Unbreak on 32 bit platforms.

The port requires GMP on platforms that lack __int128, i.e. 32 bit platforms,
but LIB_DEPENDS for libgmp is only present for i386.
This patch extends the existing i386 special case to known 32 bit platforms so
the port builds on armv7 FreeBSD and hopefully others.

PR: 258442
Approved by: danilo (maintainer timeout)

(cherry picked from commit cb25b8c9732d9bd51143dfcb533cd7e49fe05d88)