autoport: Print location of generated sources

Autoport determines the mainboard vendor and board names based on DMI
entries, which sometimes doesn't result in the most obvious name. In
addition, newcomers may not be familiar with coreboot's directory
structure and have no idea where to look. Print out the absolute patch
of the generated sources once autoport finishes so that it is easier to
locate the files.

Change-Id: I4ba00484ac57355d7539fa6e36e0e6df62719f8a
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83344
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>

util/autoport/main.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"path/filepath"
 	"sort"
 	"strings"
 )
@@ -903,4 +904,6 @@ private package GMA.Mainboard is
 end GMA.Mainboard;
 `)
 	}
+	outputPath, _ := filepath.Abs(ctx.BaseDirectory)
+	fmt.Printf("Done! Generated sources are in %s\n", outputPath)
 }