Use java_binary to generate the source jar

The jar produced by java_source rule was not ending up at the root of
the buck output folder. Pass the result from java_library to
java_binary rule so the generated source jar ends up at the root of
buck-out folder.

Change-Id: Ie0f1e417cc8c2d5764b91d5f446528931d9462a3
1 file changed