Also build-depend on linux-image-generic as, the kernel metapackage is called like that there

Keep the limit on [amd64] to avoid trying to install it in debian...

Gbp-Dch: Ignore
Signed-off-by: Mattia Rizzolo <mattia@debian.org>

debian/control

@@ -40,7 +40,7 @@ Build-Depends:
  libjs-jquery-isonscreen <!nocheck>,
  libjs-jquery-tablesorter <!nocheck>,
  libjs-jquery-throttle-debounce <!nocheck>,
- linux-image-amd64 [amd64] <!nocheck>,
+ linux-image-amd64 [amd64] <!nocheck> | linux-image-generic [amd64] <!nocheck>,
  llvm <!nocheck>,
  lz4 <!nocheck> | liblz4-tool <!nocheck>,
  mono-utils <!nocheck>,

debian/tests/control.in

 Tests: pytest-with-recommends
-Depends: diffoscope, python3-pytest, file, linux-image-amd64 [amd64], %RECOMMENDS%, %PYRECOMMENDS%
+Depends: diffoscope, python3-pytest, file, linux-image-amd64 [amd64] | linux-image-generic [amd64], %RECOMMENDS%, %PYRECOMMENDS%
 
 Tests: pytest
 Depends: diffoscope, python3-pytest, file