Updating YangLibraryDescription.java to latest buck-api

Change-Id: I7831a56ddba8659d5049957aa3a369f18de8774f
diff --git a/plugin/buck/src/main/java/org/onosproject/yangutils/plugin/buck/YangLibraryDescription.java b/plugin/buck/src/main/java/org/onosproject/yangutils/plugin/buck/YangLibraryDescription.java
index dfbdd3c..29d4225 100644
--- a/plugin/buck/src/main/java/org/onosproject/yangutils/plugin/buck/YangLibraryDescription.java
+++ b/plugin/buck/src/main/java/org/onosproject/yangutils/plugin/buck/YangLibraryDescription.java
@@ -143,6 +143,7 @@
                                 /* additionalClasspathEntries */ ImmutableSet.<Path>of(),
                                 new JavacToJarStepFactory(javacOptions, JavacOptionsAmender.IDENTITY),
                                 /* resourcesRoot */ Optional.<Path>absent(),
+                                /* manifestFile */ Optional.absent(),
                                 /* mavenCoords */ Optional.<String>absent(),
                                 /* tests */ ImmutableSortedSet.<BuildTarget>of(),
                                 /* classesToRemoveFromJar */ ImmutableSet.<Pattern>of()));