[suil] Update comments explaining filtering

[Brendan Jones]

commit 1d5c671d8f4e4b94e05de776b4bf9ce6645a8350
Author: Brendan Jones <brendan.jones.it at gmail.com>
Date:   Tue May 1 09:56:36 2012 +0200

    Update comments explaining filtering

 suil.spec |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/suil.spec b/suil.spec
index 934ea42..560b7f9 100644
--- a/suil.spec
+++ b/suil.spec
@@ -13,9 +13,13 @@ BuildRequires:  doxygen
 BuildRequires:  graphviz
 BuildRequires:  python
 BuildRequires:  lv2-devel
+# we need to track changess to these toolkits manually due to the 
+# requires filtering below
 BuildRequires:  gtk2-devel
 BuildRequires:  qt4-devel
 
+# lets not unecessarily pull in toolkits dependancies. They will be provided by 
+# the host and or the plugin
 %filter_from_requires /.*libatk.*/d
 %filter_from_requires /.*libcairo.*/d
 %filter_from_requires /.*libfont.*/d