message: Fix Log unit tests
  the llvm function for getting the thread name dropped the _np suffix
  during review. Zachary's commit did not reflect that.
diff: @@ -73,9 +73,8 @@ TEST(LogTest, log_options) {
  "World 47\n",
  GetLogString(LLDB_LOG_OPTION_PREPEND_FILE_FUNCTION, "Hello World {0}", 47));
  - EXPECT_EQ(llvm::formatv("[{0,0+4}/{1,0+4}] Hello World 47\n",
  - ::getpid(),
  - llvm::get_threadid_np())
  + EXPECT_EQ(llvm::formatv("[{0,0+4}/{1,0+4}] Hello World 47\n", ::getpid(),
  + llvm::get_threadid())
  .str(),
  GetLogString(LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD,
  "Hello World {0}", 47));
  