bpf/tests: Include <linux/prandom.h> instead of <linux/random.h>

Substitute the inclusion of <linux/random.h> header with
<linux/prandom.h> to allow the removal of legacy inclusion
of <linux/prandom.h> from <linux/random.h>.

Signed-off-by: Uros Bizjak <[e-mail]>
Cc: Andrew Morton <[e-mail]>
Cc: Alexei Starovoitov <[e-mail]>
Cc: Daniel Borkmann <[e-mail]>
Cc: Andrii Nakryiko <[e-mail]>
Cc: Martin KaFai Lau <[e-mail]>
Cc: Eduard Zingerman <[e-mail]>
Cc: Song Liu <[e-mail]>
Cc: Yonghong Song <[e-mail]>
Cc: John Fastabend <[e-mail]>
Cc: KP Singh <[e-mail]>
Cc: Stanislav Fomichev <[e-mail]>
Cc: Hao Luo <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Signed-off-by: Jason A. Donenfeld <[e-mail]>

lib/test_bpf.c

···
 #include <linux/skbuff.h>
 #include <linux/netdevice.h>
 #include <linux/if_vlan.h>
-#include <linux/random.h>
+#include <linux/prandom.h>
 #include <linux/highmem.h>
 #include <linux/sched.h>