samples: add Terra samples

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

samples/Terra/quote9.t

@@ -0,0 +1,19 @@
+a = {}
+
+local c = terralib.includec("stdio.h")
+
+
+a.c = {`1,`2,`3}
+
+a.b = quote
+    return a.c._0,(a.c)._0
+end
+
+
+terra foo()
+    a.b
+end
+
+
+local test = require("test")
+test.meq({1,1}, foo())