component/firefox: add Mesa library.

component/firefox/buildout.cfg

@@ -8,6 +8,7 @@ extends =
   ../gtk-3/buildout.cfg
   ../libffi/buildout.cfg
   ../libpng/buildout.cfg
+  ../mesa/buildout.cfg
   ../p11-kit/buildout.cfg
   ../pcre/buildout.cfg
   ../xorg/buildout.cfg
@@ -81,6 +82,7 @@ script =
   export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${libxml2:location}/lib"
   export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${libXrender:location}/lib"
   export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${libXt:location}/lib"
+  export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${mesa:location}/lib"
   export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${pango:location}/lib"
   export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${pcre:location}/lib"
   export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${pixman:location}/lib"