List all possible test_progs flavors explicitly to avoid accidentally ignoring valid source code files. In this case, test_progs.c was still ignored after recent809ed84de8("selftests/bpf: Whitelist test_progs.h from .gitignore") fix that added exception only for test_progs.h. Fixes:74b5a5968f("selftests/bpf: Replace test_progs and test_maps w/ general rule") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210914162228.3995740-1-andrii@kernel.org