samples: add Terra samples

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

samples/Terra/terranew.t

@@ -0,0 +1,19 @@
+
+
+A = terralib.new(int[4],{1,2,3,4})
+
+terra foo(a : &int)
+	var sum = 0
+	for i = 0,4 do
+		sum = sum + a[i]
+	end
+	return sum,a
+end
+
+local test = require("test")
+
+local a,b = terralib.unpackstruct(foo(A))
+
+test.eq(a,10)
+test.eq(terralib.typeof(A),int[4])
+test.eq(terralib.typeof(b),&int)