[Debian-med-packaging] Bug#1059557: python-cogent: add build support for loongarch64

[zhangdandan]

Source: python-cogent
Version: 2023.2.12a1+dfsg-4
Severity: wishlist
Tags: ftbfs
User: debian-loongarch at lists.debian.org
Usertags: loong64

Dear maintainers,

We need to add build support for loongarch64 in d/control, for example,
```
Package: python3-cogent3
-Architecture: any-amd64 arm64 mips64el ppc64el s390x ia64 ppc64 riscv64 
sparc64 alpha
+Architecture: any-amd64 arm64 mips64el ppc64el s390x ia64 loong64 ppc64 
riscv64 sparc64 alpha
```

Please consider the above support for loongarch64.
I would like to remind you that the compilation dependencies of 
python-cogent are not yet satisfied.
If you have any questions, you can contact me at any time.

thanks,
Dandan Zhang