[PATCH] selftests/interpreter: fix separate directory build

[Muhammad Usama Anjum]

Separate directory build fails of this test as headers include path isn't
set correctly in that case. Fix it by including KHDR_INCLUDES.

make -C tools/testing/selftests O=build1
gcc -Wall -O2 -I../../../../usr/include    trust_policy_test.c -lcap -o /linux_mainline/build1/kselftest/interpreter/trust_policy_test
trust_policy_test.c:14:10: fatal error: linux/trusted-for.h: No such file or directory
   14 | #include <linux/trusted-for.h>
      |          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx>
---
 tools/testing/selftests/interpreter/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/interpreter/Makefile b/tools/testing/selftests/interpreter/Makefile
index 7402fdb6533f..51dde8e01e32 100644
--- a/tools/testing/selftests/interpreter/Makefile
+++ b/tools/testing/selftests/interpreter/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-CFLAGS += -Wall -O2 -I$(khdr_dir)
+CFLAGS += -Wall -O2 -I$(khdr_dir) $(KHDR_INCLUDES)
 LDLIBS += -lcap
 
 src_test := $(wildcard *_test.c)
-- 
2.30.2