Add reports to .gitignore

Change-Id: Iccb2f331b8182a0a5cda74fe5140f60173fbaff4
Reviewed-on: http://gerrit.dmdirc.com/27
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>
Tested-by: Shane Mc Cormack <shane@dmdirc.com>

.gitignore

@@ -3,6 +3,7 @@
 /build
 /dist
 /nbproject/private
+/reports
 /plugins
 /junitreports
 /junit*.properties