crumbs: add back progress implementation for depexp

The commit which introduced the new hob UI also deleted this class
which is used by depexp.

(Bitbake rev: d54dbe54cde8e0086bf1fb4926468e212660db53)

Signed-off-by: Joshua Lock <josh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/ui/crumbs/progress.py

@@ -0,0 +1,20 @@
+import gtk
+
+class ProgressBar(gtk.Dialog):
+    def __init__(self, parent):
+
+        gtk.Dialog.__init__(self, flags=(gtk.DIALOG_MODAL | gtk.DIALOG_DESTROY_WITH_PARENT))
+        self.set_title("Parsing metadata, please wait...")
+        self.set_default_size(500, 0)
+        self.set_transient_for(parent)
+        self.progress = gtk.ProgressBar()
+        self.vbox.pack_start(self.progress)
+        self.show_all()
+
+    def update(self, x, y):
+        self.progress.set_fraction(float(x)/float(y))
+        self.progress.set_text("%2d %%" % (x*100/y))
+
+    def pulse(self):
+        self.progress.set_text("Loading...")
+        self.progress.pulse()