selftests: ptrace: Use installed kernel headers search path

Use $(KHDR_INCLUDES) as lookup path for installed kernel headers rather
than using kernel headers in include/uapi from the source kernel tree
kernel headers.

Signed-off-by: Mathieu Desnoyers <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: [email protected]
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

Author: compudj

tools/testing/selftests/ptrace/Makefile

@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-only
-CFLAGS += -std=c99 -pthread -iquote../../../../include/uapi -Wall
+CFLAGS += -std=c99 -pthread -Wall $(KHDR_INCLUDES)
 
 TEST_GEN_PROGS := get_syscall_info peeksiginfo vmaccess