linktrace: It'd help if I'd added the tool

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

tools/linktrace-to-depfile.pl

@@ -0,0 +1,18 @@
+#!/usr/bin/perl -w
+
+use strict;
+use Cwd qw(abs_path);
+
+my %deps;
+
+while (my $line = <>) {
+   chomp $line;
+   if ($line =~ /\(([^)]+)/) {
+      $deps{abs_path($1)} = 1;
+   }
+}
+
+my @deps = keys %deps;
+
+print join("\t\\\n\t", @deps), "\n";
+