samples: add Terra samples

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

samples/Terra/recoverfromerror.t

@@ -0,0 +1,15 @@
+
+
+terra what()
+	return " " / 1
+end
+
+dostuff = macro(function()
+	pcall(what.compile,what)
+	return 4
+end)
+
+terra foobar()
+	return dostuff()
+end
+assert(4 == foobar())