Bug#1068614: gmt: please add support for loong64

[wuruilong]

Source: gmt
Version: 6.5.0+dfsg-3
Followup-For: Bug #1068614
X-Debbugs-Cc: wuruilong at loongson.cn

Dear Maintainer,

Now, gmt still compiles incorrectly on loongarch, and the debian repositories don't merge this patch. please merge the 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