selftests/bpf: Convert test trace_printk to lskel.

mainline inclusion
from mainline-5.14-rc1
commit 1a532eb2
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1a532eb28df3e45ae2d403d66c0e98295688ae10

-------------------------------------------------

Convert test trace_printk to light skeleton to check
rodata support in lskel.
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Acked-by: NAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210514003623.28033-22-alexei.starovoitov@gmail.com
(cherry picked from commit 1a532eb2)
Signed-off-by: NWang Yufen <wangyufen@huawei.com>

Conflicts:
	tools/testing/selftests/bpf/Makefile
Signed-off-by: NWang Yufen <wangyufen@huawei.com>

tools/testing/selftests/bpf/Makefile

@@ -298,7 +298,7 @@ SKEL_BLACKLIST := btf__% test_pinning_invalid.c test_sk_assign.c
 LINKED_SKELS := test_static_linked.skel.h
 
 LSKELS := kfunc_call_test.c fentry_test.c fexit_test.c \
-	test_ksyms_module.c test_ringbuf.c atomics.c
+	test_ksyms_module.c test_ringbuf.c atomics.c trace_printk.c
 SKEL_BLACKLIST += $$(LSKELS)
 
 test_static_linked.skel.h-deps := test_static_linked1.o test_static_linked2.o

tools/testing/selftests/bpf/prog_tests/trace_printk.c

@@ -3,7 +3,7 @@
 
 #include <test_progs.h>
 
-#include "trace_printk.skel.h"
+#include "trace_printk.lskel.h"
 
 #define TRACEBUF	"/sys/kernel/debug/tracing/trace_pipe"
 #define SEARCHMSG	"testing,testing"