lib/testing: Include compat.h instead of using locai ifdef

The test-tool binary was using its own ifdef'ed compatibility define
instead of just including compat.h, which leads to errors when one of the
other headers in util does include compat.h. So remove the local define and
just include compat.h directly instead.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>

lib/testing/test-tool.c

@@ -15,20 +15,11 @@
 #include "logging.h"
 #include "util.h"
 #include "xdp_sample.h"
+#include "compat.h"
 
 
 #define PROG_NAME "test-tool"
 
-
-#ifndef HAVE_LIBBPF_BPF_OBJECT__NEXT_PROGRAM
-static struct bpf_program *bpf_object__next_program(const struct bpf_object *obj,
-  						    struct bpf_program *prog)
-{
-  	return bpf_program__next(prog, obj);
-}
-#endif
-
-
 struct enum_val xdp_modes[] = {
        {"native", XDP_MODE_NATIVE},
        {"skb", XDP_MODE_SKB},