README: update deps

Change-Id: I908480e8854b07d10a817fec0b2d75bf9bdfec62
diff --git a/doc/README.txt b/doc/README.txt
index 7a325dd..04989a1 100644
--- a/doc/README.txt
+++ b/doc/README.txt
@@ -15,12 +15,14 @@
 Packages required to run the osmo-gsm-tester:
 
   dbus
-  python3
-  python3-dbus
-  python3-pip
-  python3-mako
   tcpdump
-  smpplib (pip install git+git://github.com/podshumok/python-smpplib.git)
+  python3
+  python3-yaml
+  python3-mako
+  python3-pip
+  python3-gi
+  smpplib: pip3 install git+git://github.com/podshumok/python-smpplib.git
+  pydbus: pip3 install pydbus
   ofono
 
 To build ofono: