Added ccd_defs_check.pl to verify that ccd_defs.json compiles.

Former-commit-id: c85e3890d9

ccd_defs_check.pl

@@ -0,0 +1,20 @@
+#!/usr/bin/env perl
+
+use strict;
+
+use File::Basename qw( dirname );
+use File::Spec;
+use JSON;
+
+my $dir = dirname($0);
+my $ccd_defs = File::Spec->catfile($dir, 'ccd_defs.json');
+
+open my $fh, $ccd_defs
+    or die "Unable to open $ccd_defs : $!";
+local $/;
+my $json = <$fh>; # Slurp
+close $fh;
+
+decode_json($json);
+print "CCD_DEFS compiles OK\n";
+exit 0;