Remote Process Dialog: Update buttons if sysroot changes

Make sure 'Attach to Selected Process' is enabled again e.g. if first attaching
fails because of a missing sysroot, and the user then sets the sysroot.

Change-Id: I1aa949bfe0aa41186a76e7f683dd29070a6b63d4
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/remotelinux/startgdbserverdialog.cpp

@@ -194,6 +194,8 @@ StartGdbServerDialog::StartGdbServerDialog(QWidget *parent) :
         connect(d->tableView->selectionModel(),
             SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
             SLOT(updateButtons()));
+        connect(d->sysrootPathChooser, SIGNAL(changed(QString)),
+                SLOT(updateButtons()));
         //connect(d->updateListButton, SIGNAL(clicked()),
         //    SLOT(updateProcessList()));
         connect(d->attachProcessButton, SIGNAL(clicked()), SLOT(attachToProcess()));