Bug#1038019: airstrike: Depends on SDL 1.2

[Simon McVittie]

On Thu, 15 Jun 2023 at 12:32:32 +0100, Simon McVittie wrote:
> 4. Install libsdl1.2-compat-dev and recompile the package.

I tried this on a porterbox and it seems to build fine. I didn't test
the resulting binaries.

    smcv