[PATCH bpf-next] bpf_helpers_doc.py: Fix warning when compiling bpftool.

[Carlos Neira <cneirabustos@xxxxxxxxx>]

When compiling bpftool the following warning is found: 
"declaration of 'struct bpf_pidns_info' will not be visible outside of this function."
This patch adds struct bpf_pidns_info to type_fwds array to fix this.

Signed-off-by: Carlos Neira <cneirabustos@xxxxxxxxx>
---
 scripts/bpf_helpers_doc.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts/bpf_helpers_doc.py b/scripts/bpf_helpers_doc.py
index c1e2b5410faa..f43d193aff3a 100755
--- a/scripts/bpf_helpers_doc.py
+++ b/scripts/bpf_helpers_doc.py
@@ -400,6 +400,7 @@ class PrinterHelpers(Printer):
             'struct bpf_fib_lookup',
             'struct bpf_perf_event_data',
             'struct bpf_perf_event_value',
+            'struct bpf_pidns_info',
             'struct bpf_sock',
             'struct bpf_sock_addr',
             'struct bpf_sock_ops',
-- 
2.20.1