Fix eclipse project generation

In Ief63f06cb53 the build was changed to consume protobuf java library
from rules_closure repository, but the eclipse project generation was
not adapted.

Change-Id: I164a1d7d60dba9a2a9a377d9bea11f4d95827098

tools/eclipse/project.py

@@ -155,6 +155,7 @@ def gen_classpath(ext):
       # Exceptions: both source and lib
       if p.endswith('libquery_parser.jar') or \
          p.endswith('prolog/libcommon.jar') or \
+         p.endswith('com_google_protobuf/libprotobuf_java.jar') or \
          p.endswith('lucene-core-and-backward-codecs__merged.jar'):
         lib.add(p)
       # JGit dependency from external repository