selftests/tracing: Fix to check awk supports non POSIX strtonum()

Check the awk command supports non POSIX strtonum() function in
the trace_marker_raw test case.

Fixes: 37f4660138 ("selftests/tracing: Add basic test for trace_marker_raw file")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/177071726229.2369897.11506524546451139051.stgit@mhiramat.tok.corp.google.com
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/ftrace/test.d/00basic/trace_marker_raw.tc

@@ -4,6 +4,8 @@
 # requires: trace_marker_raw
 # flags: instance
 
+check_awk_strtonum || exit_unresolved
+
 is_little_endian() {
 	if lscpu | grep -q 'Little Endian'; then
 		echo 1;

tools/testing/selftests/ftrace/test.d/functions

@@ -173,6 +173,10 @@ check_requires() { # Check required files and tracers
     done
 }
 
+check_awk_strtonum() { # strtonum is GNU awk extension
+    awk 'BEGIN{strtonum("0x1")}'
+}
+
 LOCALHOST=127.0.0.1
 
 yield() {