readme: added vte-ng build dependencies on stretch

README.md

@@ -2,8 +2,17 @@
 
 https://github.com/thestinger/termite.git
 
+## Build Dependencies
+
+### Raspian 9.9 Stretch
+
+```sh
+# thestinger/vte-ng
+sudo apt-get install gtk-doc-tools libglib2.0-dev libtool-bin intltool libpcre2-dev libgtk-3-dev libgnutls28-dev gobject-introspection libgirepository1.0-dev valac gperf libxml2-utils
+```
+
 ## Installation
 
-```{sh}
+```sh
 git clone git@git.hammerle.me:fphammerle/config-termite.git $HOME/.config/termite
 ```