Add gcc2tasks.pl for converting GCC warning logs into .tasks files.

Change-Id: I408d2170575c99a690af53d32b08318e6060f525
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

scripts/gcc2tasks.pl

+#!/usr/bin/perl -w
+
+=head1 NAME
+
+msvc2tasks.pl - Convert GCC warnings into Qt Creator task files.
+
+=head1 SYNOPSIS
+
+    gcc2tasks.pl < logfile > taskfile
+
+=cut
+
+use strict;
+
+while (my $line = <STDIN> ) {
+    chomp($line);
+    # --- extract file name based matching:
+    # file.cpp:214:37: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
+    if ($line =~ /^([^:]+):(\d+):\d*:? warning: (.*)$/) {
+        my $fileName = $1;
+        my $lineNumber = $2;
+        my $text = $3;
+        $fileName =~ s|\\|/|g;
+        print $fileName, "\t", $lineNumber, "\twarn\t", $text,"\n";
+    }
+}