[gxml] Added SerializableDouble property class

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 9fbc17e47073448df90c3e98b11ecc97e9530e53
Author: Daniel Espinosa <esodan gmail com>
Date:   Tue Oct 6 13:12:14 2015 -0500

    Added SerializableDouble property class

 gxml/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gxml/Makefile.am b/gxml/Makefile.am
index 30bcd30..3f3fed6 100644
--- a/gxml/Makefile.am
+++ b/gxml/Makefile.am
@@ -57,6 +57,7 @@ sources = \
        Serializable.vala \
        SerializableProperty.vala \
        SerializableBool.vala \
+       SerializableDouble.vala \
        SerializableEnum.vala \
        SerializableInt.vala \
        SerializableValueList.vala \