samples: add Terra samples

source: https://github.com/zdevito/terra/tree/master/tests

samples/Terra/array.t

@@ -0,0 +1,60 @@
+
+terra bar()
+	var a : int[2]
+	a[0] = 1
+	a[1] = 2
+	return a
+end
+
+terra foo()
+	var a : int[4]
+	a[1], a[2] = 4,2
+	return a[1] + a[2]
+end
+
+terra foo2()
+	var b = bar()
+	return b[0] + b[1]
+end
+
+terra foo3()
+	return (bar())[0]
+end
+
+terra foo4()
+	var a : int[4]
+	a[3] = 7
+	var b = &a[0]
+	b[2] = 8
+	return b[2] + b[3]
+end
+
+terra bar2(a : &int)
+    a[1] = 100
+    return a[0]
+end
+
+terra foo5()
+    var a : int[4]
+    bar2(a)
+    return a[1]
+end
+
+terra foo6()
+    return bar2(bar())
+end
+
+
+terra foo7()
+    var a = array(1,2,3,4)
+    return a[1]+a[2]
+end
+local test = require("test")
+
+test.eq(6,foo())
+test.eq(3,foo2())
+test.eq(1,foo3())
+test.eq(15,foo4())
+test.eq(100,foo5())
+test.eq(1,foo6())
+test.eq(5,foo7())