[fractal/wip/cdavis/next-subprojects-gitignore] gitignore: Add subproject directories

[Christopher Davis <christopherdavis src gnome org>]

commit 840a3deb77f70224dbcf6a5d78970f9f553d34cb
Author: Christopher Davis <christopherdavis gnome org>
Date:   Tue Jun 22 14:09:22 2021 -0700

    gitignore: Add subproject directories
    
    These directories should be ignored so that we don't
    accidentally commit subproject code.

 .gitignore | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitignore b/.gitignore
index ef3b87f1..048312f0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,5 @@ src/config.rs
 *.ui.in~
 *.ui~
 .flatpak
+subprojects/libadwaita
+subprojects/gtksourceview