x11/wayst: broken on armv7

In file included from src/gfx_gl2.c:3:
src/vt.h:278:1: error: requested alignment is less than minimum alignment of 8 for type 'VtCommand'

278 | DEF_RC_PTR(VtCommand, VtCommand_destroy);
    | ^

src/rcptr.h:24:9: note: expanded from macro 'DEF_RC_PTR'

24 |         alignas(alignof(void*)) t payload;                                                         \
   |         ^

/usr/include/stdalign.h:34:19: note: expanded from macro 'alignas'

34 | #define alignas                 _Alignas
   |                                 ^

MFH: 2026Q1
See also: https://github.com/91861/wayst/issues/120
Approved by: portmgr (build fix blanket)

(cherry picked from commit 71e8bf055bf2be2092d87e2b9f688699cca89d3e)