Add glog dependency to gutil
Add glog dependency to gutil

This dependency is needed to avoid the following error when dynamically
linking:

[  8%] Running C++ protocol buffer compiler on histogram.proto
/home/mpercy/src/kudu/build/debug/protoc-gen-insertions: symbol lookup error: /home/mpercy/src/kudu/build/debug/libgutil.so: undefined symbol: google::kLogSiteUninitialized
--insertions_out: protoc-gen-insertions: Plugin failed with status code 127.

I grepped a bit and indeed, glog is used both directly in
protoc-gen-insertions.cc and indirectly in src/gutil/*

Change-Id: I177026a22197ce5f9cc1d1dfb6c3f91d3ec62178
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3196
Reviewed-by: Adar Dembo <866ca730bfc7f544e3ebce604ceeba4879f23df0@cloudera.com>
Tested-by: Michael Percy <e07a1fd797b473a9c849e618aa2ce06d8055760b@cloudera.com>

cloudera/kudu,InspurUSA/kudu,InspurUSA/kudu,helifu/kudu,andrwng/kudu,InspurUSA/kudu,cloudera/kudu,andrwng/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,andrwng/kudu,EvilMcJerkface/kudu,helifu/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,helifu/kudu,andrwng/kudu,helifu/kudu,cloudera/kudu,andrwng/kudu,andrwng/kudu,helifu/kudu,InspurUSA/kudu,cloudera/kudu,InspurUSA/kudu,helifu/kudu,EvilMcJerkface/kudu,cloudera/kudu,andrwng/kudu,EvilMcJerkface/kudu,cloudera/kudu,andrwng/kudu,helifu/kudu,helifu/kudu,cloudera/kudu,EvilMcJerkface/kudu,helifu/kudu,cloudera/kudu,cloudera/kudu,andrwng/kudu