samples: add Terra samples

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

samples/Terra/renaming.t

@@ -0,0 +1,21 @@
+
+C = terralib.includec("stdio.h")
+terra main()
+    C.printf("what\n")
+end
+main:setinlined(false)
+
+terra realmain()
+    main()
+end
+
+terra foo()
+end
+and terra foo(a : int)
+end
+
+foo:compile()
+
+terralib.saveobj("renamed",{ main = realmain })
+
+terralib.dumpmodule()