misc/claude-code-legacy: fix build on armv7

This is the same issue as in 0c9905d54dedcf8763df802a01beb2ea3d4ac4a0,
but for some reason cargo complains about a checksum error if I patch
it. Work around the error for now by disabling the AUDIO_CAPTURE
option on arm, without which this problem does not occur.

Maintainer should strongly consider unbundling the rust bits so that
they use the conventional rust support instead of hand-rolling a poorly
conceived solution.

See also: 0c9905d54dedcf8763df802a01beb2ea3d4ac4a0
MFH: 2026Q3
Approved by: portmgr (build fix blanket)

(cherry picked from commit cb13c34eb2244f54519722d66dc3b639936b2934)