[gnome-builder/editor-layout] add comment for rgba() support

[Christian Hergert <chergert src gnome org>]

commit e65a08789ea03060c9aae5bf79258a30f8c6739b
Author: Christian Hergert <christian hergert me>
Date:   Sat Nov 29 18:01:35 2014 -0800

    add comment for rgba() support

 data/styles/builder.xml |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/data/styles/builder.xml b/data/styles/builder.xml
index 82586a1..391ea3c 100644
--- a/data/styles/builder.xml
+++ b/data/styles/builder.xml
@@ -33,6 +33,9 @@
   <color name="blue2" value="#0077aa"/>
   <color name="purple1" value="#990055"/>
   <color name="pink1" value="#dd4a68"/>
+  <!-- Once gtksourceview supports rgba, we can uncomment this.
+  <color name="pink2" value="rgba(235,202,210,.5)"/>
+  -->
   <color name="pink2" value="#EBCAD2"/>
   <color name="green1" value="#669900"/>
   <color name="text1" value="#4d4e53"/>