[PATCH next 1/3] selftests:connector: Fix Makefile to include KHDR_INCLUDES

[Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>]

The test compile fails with following errors. Fix the Makefile
CFLAGS to include KHDR_INCLUDES to pull in uapi defines.

gcc -Wall     proc_filter.c  -o ../tools/testing/selftests/connector/proc_filter
proc_filter.c: In function ‘send_message’:
proc_filter.c:22:33: error: invalid application of ‘sizeof’ to incomplete type ‘struct proc_input’
   22 |                          sizeof(struct proc_input))
      |                                 ^~~~~~
proc_filter.c:42:19: note: in expansion of macro ‘NL_MESSAGE_SIZE’
   42 |         char buff[NL_MESSAGE_SIZE];
      |                   ^~~~~~~~~~~~~~~
proc_filter.c:22:33: error: invalid application of ‘sizeof’ to incomplete type ‘struct proc_input’
   22 |                          sizeof(struct proc_input))
      |                                 ^~~~~~
proc_filter.c:48:34: note: in expansion of macro ‘NL_MESSAGE_SIZE’
   48 |                 hdr->nlmsg_len = NL_MESSAGE_SIZE;
      |                                  ^~~~~~~~~~~~~~~
`

Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>
Link: https://lore.kernel.org/all/CA+G9fYt=6ysz636XcQ=-KJp7vJcMZ=NjbQBrn77v7vnTcfP2cA@xxxxxxxxxxxxxx/
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
---
 tools/testing/selftests/connector/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/connector/Makefile b/tools/testing/selftests/connector/Makefile
index 21c9f3a973a0..92188b9bac5c 100644
--- a/tools/testing/selftests/connector/Makefile
+++ b/tools/testing/selftests/connector/Makefile
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-CFLAGS += -Wall
+CFLAGS += -Wall $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS = proc_filter
 
-- 
2.39.2