Snippets for pixman 0.46.4 from FreeBSD 150arm64

Sourced from https://pkg-status.freebsd.org/ampere5/data/latest-per-pkg/pixman/0.46.4/150arm64-default.log.

• ../pixman/pixman-glyph.c:638:16: warning: unknown attribute '__force_align_arg_pointer__' ignored [-Wunknown-attributes]
    638 | __attribute__((__force_align_arg_pointer__))
        |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~