[PATCH iproute2-next] bpf_glue: include errno.h

If __NR_bpf is not enabled, bpf() function set errno and return -1. Thus, 
this patch includes the header.

Fixes: ac4e0913beb1 ("bpf: Export bpf syscall wrapper")
Signed-off-by: Juhee Kang <redacted>
---
 lib/bpf_glue.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/bpf_glue.c b/lib/bpf_glue.c
index c1cf351b..88a24751 100644
--- a/lib/bpf_glue.c
+++ b/lib/bpf_glue.c

@@ -7,6 +7,7 @@
 #include <sys/syscall.h>
 #include <limits.h>
 #include <unistd.h>
+#include <errno.h>
 
 #include "bpf_util.h"
 #ifdef HAVE_LIBBPF

-- 
2.34.1