try to fix source build

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/org.eclipse.vex.sdk.feature/build.properties b/org.eclipse.vex.sdk.feature/build.properties
index f136d18..1fbc80f 100644
--- a/org.eclipse.vex.sdk.feature/build.properties
+++ b/org.eclipse.vex.sdk.feature/build.properties
@@ -2,5 +2,9 @@
                license.html,\
                epl-v10.html,\
                feature.properties
-
+src.includes = epl-v10.html,\
+               feature.properties,\
+               feature.xml,\
+               license.html
 generate.feature@org.eclipse.vex.feature.source=org.eclipse.vex.feature
+               
\ No newline at end of file