Bug#1058649: ffcall: Add patch

[wuruilong <wuruilong@loongson.cn>]

Source: ffcall
Version: 2.4-2.1
Followup-For: Bug #1058649
X-Debbugs-Cc: wuruilong@loongson.cn

Dear Maintainer,

The current version of the patch was made according to the upstream and compiled successfully on loongarch.
Tried to add the patch using the attachment, but was unsuccessful. The link to the patch is here: https://github.com/loongarchlinux/extra/blob/main/ffcall/libffcall-la64-2.4.patch

wuruilong

-- System Information:
Debian Release: trixie/sid
  APT prefers unreleased
  APT policy: (500, 'unreleased'), (500, 'unstable')
Architecture: loong64 (loongarch64)

Kernel: Linux 5.10.0-60.96.0.126.oe2203.loongarch64 (SMP w/32 CPU threads)
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: unable to detect