Updated build.properties to resolve warnings for source build
diff --git a/tests/org.eclipse.graphiti.testtool.ecore/build.properties b/tests/org.eclipse.graphiti.testtool.ecore/build.properties
index f4b0c26..775023a 100644
--- a/tests/org.eclipse.graphiti.testtool.ecore/build.properties
+++ b/tests/org.eclipse.graphiti.testtool.ecore/build.properties
@@ -22,6 +22,4 @@
 jars.compile.order = .
 source.. = src/
 output.. = bin/
-src.includes = src/,\
-               META-INF/,\
-               plugin.properties
+src.includes = about.html