Add about files to build.
diff --git a/org.eclipse.ptp.rcp.sysmon/build.properties b/org.eclipse.ptp.rcp.sysmon/build.properties
index 0f81018..b1cbc69 100644
--- a/org.eclipse.ptp.rcp.sysmon/build.properties
+++ b/org.eclipse.ptp.rcp.sysmon/build.properties
@@ -3,6 +3,9 @@
                META-INF/,\
                .,\
                plugin.properties,\
+               about.ini,\
+               about.mappings,\
+               about.properties,\
                splash.bmp,\
                icons/,\
                plugin_customization.ini