[test/Object, obj2yaml] - Move test cases from test/Object and cleanup.

test/Object is not correct place to have tests that check obj2yaml
functionality, because we have test/tools/obj2yaml folder for that.

In this patch I merged a few test cases with their YAMLs from Inputs
folder, converted one of binary inputs and moved them to
tools/obj2yaml folder.

There are still another tests that might need the same, so it is initial step. 

Differential revision: https://reviews.llvm.org/D64555

llvm-svn: 365891