MCOL-2244 Columnstore execution threads now have names describe

the threads operation. This should simplify CPU bottlenecks troubleshooting.

utils/common/threadnaming.h

@@ -0,0 +1,24 @@
+/* Copyright (C) 2019 MariaDB Corporaton
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; version 2 of
+   the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+#ifndef H_SETTHREADNAME
+#define H_SETTHREADNAME
+
+namespace utils
+{
+    void setThreadName(const char *threadName);
+} // end of namespace
+#endif