headers_check: Fix warning text

Fix the warning text too, per Randy.

Cc: Alexander Shishkin <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: WANG Cong <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Michal Marek <[email protected]>
1 file changed