Commit "a15e35c4eb falcosecurity-libs: add new package" uses the infras
kernel-module and generic-package. Neither of them support
<pkg>_SUPPORTS_IN_SOURCE_BUILD, only the CMake infra does.
So drop the bogus symbol.
Cc: Francis Laniel <flaniel@linux.microsoft.com>
Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
cbb6a55e6e