repo wide : Name SDRangel-owned threads for debugging

Assign descriptive names to SDRangel threads so thread activity can be
identified when investigating multi-threaded behavior, including crashes,
leaks, and synchronization issues in debuggers and others tools.

Use compact names to fit platform thread-name limits (14 chars) while
retaining the component and thread role where possible.

Signed-off-by: Robin Getz <rgetz503@gmail.com>

plugins/samplesource/testsource/testsourceinput.cpp

@@ -98,6 +98,7 @@ bool TestSourceInput::start()
     }
 
     m_testSourceWorkerThread = new QThread();
+    m_testSourceWorkerThread->setObjectName("TestSourceInput");
     m_testSourceWorker = new TestSourceWorker(&m_sampleFifo);
     m_testSourceWorker->moveToThread(m_testSourceWorkerThread);