kselftest/vDSO: Fix message formatting for clock_id logging

When logging the ID of the currently tested clock vdso_test_clock() puts a
spurious newline at the start of the format string resulting in output
such as

  #
  clock_id: CLOCK_BOOTTIME

which is a valid but empty KTAP informational message followed by a non
conferment output line. Remove the initial newline to create a more KTAP
friendly

  # clock_id: CLOCK_BOOTTIME
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/vDSO/vdso_test_abi.c

@@ -170,7 +170,7 @@ static void vdso_test_clock_getres(clockid_t clk_id)
  */
 static inline void vdso_test_clock(clockid_t clock_id)
 {
-	ksft_print_msg("\nclock_id: %s\n", vdso_clock_name[clock_id]);
+	ksft_print_msg("clock_id: %s\n", vdso_clock_name[clock_id]);
 
 	vdso_test_clock_gettime(clock_id);