Logging improvements for C++ / Java structure issues

When C++ and Java structures are different sizes or arranged
differently some log statements are useful but are hard to
pick out because they merge with other log lines. Adding
"\n" to the end of them makes it easier to read.

Change-Id: Ia6d78e0832c7814bf1fef42bb3d8c056f83766bd
Test: make build-art-host