Adds line numbering in errors for test helpers

Adds to the 'generate_code.pl' tool, support to insert line numbers
before test suite helper code.
diff --git a/tests/scripts/generate_code.pl b/tests/scripts/generate_code.pl
index e940b5a..49af2db 100755
--- a/tests/scripts/generate_code.pl
+++ b/tests/scripts/generate_code.pl
@@ -90,6 +90,11 @@
 my $test_cases;
 my $index = 2;
 for my $line (@test_cases_lines) {
+    if ($line =~ /^\/\* BEGIN_SUITE_HELPERS .*\*\//)
+    {
+        $line = $line."#line $index \"$test_case_file\"\n";
+    }
+
     if ($line =~ /^\/\* BEGIN_CASE .*\*\//)
     {
         $line = $line."#line $index \"$test_case_file\"\n";