Adds missing class for airspy tuner

src/source/tuner/airspy/AirspySampleRate.java

@@ -0,0 +1,35 @@
+package source.tuner.airspy;
+
+public class AirspySampleRate
+{
+	private int mIndex;
+	private int mValue;
+	private String mLabel;
+	
+	public AirspySampleRate( int index, int value, String label )
+	{
+		mIndex = index;
+		mValue = value;
+		mLabel = label;
+	}
+	
+	public int getIndex()
+	{
+		return mIndex;
+	}
+	
+	public int getRate()
+	{
+		return mValue;
+	}
+	
+	public String getLabel()
+	{
+		return mLabel;
+	}
+	
+	public String toString()
+	{
+		return getLabel();
+	}
+}