[chronojump] Updated howto_glade.txt with Pop_os instructions

[Xavier de Blas <xaviblas src gnome org>]

commit 6a87cebd924b2be978bfe4f5886ea9581f7b23c6
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Nov 9 10:22:53 2020 +0100

    Updated howto_glade.txt with Pop_os instructions

 howto_glade.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
---
diff --git a/howto_glade.txt b/howto_glade.txt
index dd207252..ca83a78f 100644
--- a/howto_glade.txt
+++ b/howto_glade.txt
@@ -16,3 +16,18 @@ $ sudo pacman -S python2 gobject-introspection python2-gobject2 gtk-doc
 
 makepkg and install with:
 makepkg -si 
+
+* pop_os 20.04
+
+https://download.gnome.org/sources/glade3/3.8/
+
+autogen seems to want:
+sudo apt install gnome-common
+https://download.gnome.org/sources/gtk-doc/
+xsltproc
+
+but configure has enough with:
+
+sudo apt install itstool libgladeui-2-6
+./configure
+sudo make install