[SE] Change CoreTests target name Summary: Call it StreamExecutorCoreTests in order to prevent collision with targets from other modules. Reviewers: jlebar, jprice Subscribers: beanz, mgorny, jlebar, parallel_libs-commits Differential Revision: https://reviews.llvm.org/D24949 llvm-svn: 282491 GitOrigin-RevId: 7bb01a2dc42602030b41708cdc6b42ec92eb14d8